How to Track Grandchild Development Milestones

Table of Contents

• Why Tracking Developmental Milestones Matters as a Grandparent
• What to Observe During Your Visits
  • Physical development and movement
  • Communication and language
  • Social and emotional growth
• Developmental Milestones by Age: What to Look For
  • 2 months to 12 months
  • 12 months to 2 years
  • 2 years to 5 years
• Using a Grandparent Milestone Journal to Record Progress
• Using the CDC Milestone Tracker App for Reference
• How to Talk to Parents About Developmental Concerns
• What to Do When You Notice a Child Is Not Meeting a Milestone
• Tracking Across Households and Caregiving Settings
  • Use one shared log the parents control
  • Keep your own backup notes
  • Coordinate with other caregivers, through the parents
  • Share patterns, not one-offs
  • Send wins, not just worries
  • Don't compare across children
• Conclusion
• Frequently Asked Questions

Last Updated: October 18, 2026

Why Tracking Developmental Milestones Matters as a Grandparent

Watching your grandchild grow is one of life's great gifts. But it's also a responsibility. When you spend time with them, you're in a unique position to notice things their parents might miss, especially if you see them regularly or live nearby.

When you track grandchild development, you stay connected to their growth. It gives you concrete things to observe instead of just playing and hoping everything is fine. And it creates a bridge between you and your adult children. When you can share specific observations, not worries, just facts, parents take you seriously.

At The Grandparent Advantage, we work with grandparents who want to stay involved without overstepping. One of the clearest ways to do that is to be the person who notices and reports, not the person who judges. You're not a doctor. You're not diagnosing anything. You're simply paying attention and documenting what you see.

This matters because early childhood is when small differences show up. A child who's not babbling by 9 months, or not walking by 18 months, or not using words by 2 years might benefit from early help. The earlier someone gets support, the better the outcome tends to be. And you, as a grandparent, can be the first to spot it.

The goal isn't to worry. It's to be useful. When you track your grandchild's development, you become a reliable source of information for the parents. You're helping them see their own child more clearly.

What to Observe During Your Visits

You don't need special training to notice development. You just need to know what to look for. Development happens in three main areas, and they overlap constantly.

Physical development and movement

Watch how your grandchild moves. Can they hold their head up? Reach for things? Sit without support? Roll over? Crawl? Walk? Run? Climb?

Write down what you see:

• Age and what they could do (e.g., "At 7 months, she reached across her body to grab a toy")
• What they couldn't do yet (e.g., "Not crawling yet, but rolling both ways")
• How they move compared to last visit (e.g., "Steadier on his feet than three weeks ago")

Physical milestones follow a predictable order. Babies sit before they stand. They stand before they walk. But the timing varies widely. One child walks at 11 months. Another at 16 months. Both are normal.

What matters is progress. Is your grandchild getting stronger? More coordinated? Trying new movements? That's what you're tracking.

Communication and language

Listen to your grandchild. What sounds do they make? Do they respond when you talk to them? Do they point at things? Do they use words?

Write down:

• Sounds and babbling (e.g., "Making 'ba-ba-ba' sounds")
• Understanding (e.g., "Looks when I say 'where's the dog?'")
• First words (e.g., "Says 'mama' and 'dada'")
• Gestures (e.g., "Waves bye-bye"; "Points at the dog")

Language development matters because it shows your grandchild is connecting with the world. They're learning that sounds mean things. That words get them what they need.

Social and emotional growth

Watch how your grandchild relates to you and others. Do they smile? Make eye contact? Laugh? Show you things? Get upset when you leave? Calm down when you comfort them?

Write down:

• Smiling and eye contact (e.g., "Big smile when she saw me")
• Showing interest in you (e.g., "Brought me a toy to look at")
• Emotional responses (e.g., "Cried when I left; mom said it took 10 minutes to calm down")
• Play and engagement (e.g., "Played peek-a-boo for 15 minutes")

Social-emotional development is about connection. Your grandchild is learning that people are safe, that their feelings matter, and that adults will respond to them. You're part of that learning.

Developmental Milestones by Age: What to Look For

Development doesn't happen all at once. It unfolds in stages. Here's what typical development looks like at different ages. Remember: every child is different. These are guides, not deadlines.

2 months to 12 months

At 2-3 months:

• Holds head up briefly
• Follows objects with eyes
• Makes cooing sounds
• Smiles socially

At 4-6 months:

• Reaches for toys
• Rolls one direction
• Babbles (ba-ba, da-da)
• Laughs out loud
• Recognizes familiar people

At 7-9 months:

• Sits without support
• Transfers objects hand to hand
• Says single syllables with meaning
• Responds to their name
• Shows stranger anxiety (normal)

At 10-12 months:

• Crawls or scoots
• Pulls to stand
• Points at things
• Says first words (mama, dada)
• Waves bye-bye
• Plays peek-a-boo

12 months to 2 years

At 12-18 months:

• Walks independently
• Climbs stairs with help
• Stacks two blocks
• Uses 10-50 words
• Points to body parts when asked
• Follows simple directions
• Shows affection

At 18-24 months:

• Runs and climbs
• Throws a ball
• Uses 50+ words
• Puts two words together ("more milk")
• Points to pictures in books
• Plays simple pretend games
• Shows independence ("me do it")

2 years to 5 years

At 2-3 years:

• Jumps
• Pedals a tricycle
• Uses 200+ words
• Speaks in short sentences
• Asks questions
• Plays alongside other children
• Follows two-step directions

At 3-4 years:

• Runs, climbs, balances
• Draws circles and lines
• Uses 1,000+ words
• Tells simple stories
• Plays with other children
• Follows three-step directions
• Shows empathy

At 4-5 years:

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• Hops and skips
• Draws recognizable shapes
• Writes some letters
• Asks "why" constantly
• Plays cooperatively
• Understands time concepts
• Follows complex directions

Using a Grandparent Milestone Journal to Record Progress

The best way to track your grandchild's development is to write it down. You don't need anything fancy. A notebook works. A phone note works. What matters is that you capture what you see when you see it.

Here's how to keep a simple journal:

Date and age. Write when you visited and how old your grandchild was. Example: "Oct 18, 2026. Emma is 14 months old."

What they did. Write specific things you observed. Not "she's getting big." Write "she walked across the room holding the couch, let go for two steps, then sat down."

What surprised you. Write what's new since last time. "First time she pointed at something and looked at me to see if I saw it too."

What they're working on. Write what they're trying but not quite doing yet. "He's trying to climb the stairs but needs help."

How they seem. Write about mood and energy. "Happy and playful today. Laughed a lot."

Questions for parents. Write anything you're curious about. "Is she sleeping better? Last time she seemed tired."

Keep it simple. Five sentences is plenty. The goal is to have a record of how you track grandchild development, something you can look back on and share with the parents.

Your journal becomes evidence. When you tell the parents "she's saying more words," you can show them your notes. You're not making it up. You're documenting. That credibility matters.

Using the CDC Milestone Tracker App for Reference

The CDC (Centers for Disease Control and Prevention) offers a free tool called the Milestone Tracker app. It's built for parents, but you can use it as a reference without taking over the parents' job. The trick is to use it as a lookup, not a scorecard.

Here's how I'd use it as a grandparent:

1. Ask the parents first. Say: "I found that free CDC milestone app. Would it help if I checked it before visits so I know what to watch for? I won't set anything up for her, I just want to be a better observer." Wait for a yes.
2. Look up the age range, not the exact date. Open the app, pick your grandchild's age band, and read the list once before you go over. You're priming your eyes, nothing more.
3. Watch during play, not during a test. Don't run through the list with your grandchild like a quiz. Notice during normal play and note what you actually saw.
4. Write down what you saw, not what was checked. In your journal, write the example: "At 15 months, stacked three blocks and said 'up.'" Not "passed block milestone."
5. Leave the app to the parents. If they want to log milestones in it, that's their call. You keep your own notes and share observations in conversation.

The app is useful for a few specific things:

• Seeing what's typical at a given age so you're not comparing your grandchild to a cousin who walked at 10 months
• Getting activity ideas that support development at that stage
• Learning the CDC's list of things to mention to a doctor, so you know what's worth raising
• Sharing a screenshot with the parents if they ask what you were looking at

A few cautions, because this matters:

• It's a monitoring tool, not a diagnosis. The CDC is clear that milestone checklists support monitoring and are not a substitute for a developmental evaluation. If something concerns you, the pediatrician is the right person, not the app.
• Children vary. The CDC notes that children reach milestones at different times. A missed item on a list is a prompt to watch, not a verdict.
• Don't forward screenshots as alarms. Sending a parent a red-flagged checklist item with no context reads as an accusation. Send observations, not screenshots, unless they ask.

If you want a simple way to keep your own notes consistent with what the app shows, a small notebook or phone note is enough. Date, age, what you saw, what was new. That's the whole system.

If you want word-for-word ways to raise what you notice with the parents, The Grandparent Playbook has ten boundary scripts for exactly that kind of conversation. You can find it at The Grandparent Playbook.

How to Talk to Parents About Developmental Concerns

This is the hard part. You've noticed something. Maybe your grandchild isn't doing what you'd expect for their age. Or they're doing something that worries you. Now you have to tell the parents without making them defensive.

Here's the key: lead with observation, not judgment. You're not saying "something's wrong." You're saying "here's what I noticed."

Use this script:

"I want to check something with you. I've noticed [specific observation]. Have you noticed that too? I'm not worried, just want to make sure we're on the same page."

Examples:

• "I've noticed she's not babbling much yet. Have you noticed that? I'm not worried, just want to make sure we're on the same page."
• "He seems to startle really easily. Have you seen that? I'm not worried, just want to make sure we're on the same page."
• "I haven't heard her say any words yet, and she's 18 months old. Have you noticed that? I'm not worried, just want to make sure we're on the same page."

Notice what you're doing: you're asking a question, not making a statement. You're inviting them into the observation. You're saying you're not worried, which gives them permission not to be defensive.

If they've noticed it too, great. You're allies. If they haven't, you've planted a seed without attacking.

What you're not doing: diagnosing, comparing to other kids, or suggesting they're doing something wrong.

If the parents seem concerned, the next step is theirs. They can talk to their pediatrician. That's a professional conversation. Your job is to notice and report, not to diagnose.

What to Do When You Notice a Child Is Not Meeting a Milestone

Sometimes you notice something that doesn't fit the typical pattern. Your grandchild is 2 years old and not using any words. Or they're 18 months old and not walking. Or they're 3 years old and won't make eye contact.

First: don't panic. Development varies. One child talks at 18 months. Another at 30 months. Both can be fine.

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Second: check your facts. Are you comparing your grandchild to other kids their age, or to the actual timeline? Sometimes we think something is delayed when it's actually normal.

Third: mention it to the parents. Use the script above. Stick to what you've observed. Don't diagnose.

Fourth: let the parents decide what to do. They may call the pediatrician. They may wait and watch. That's their call to make. Your job is to report, not to push.

If you're genuinely concerned, if something feels really off, you can say so. But be honest about what you know and don't know. "I'm not an expert, but this seems worth asking the doctor about" is different from "something's wrong with your child."

The pediatrician is the right person to evaluate. You're the person who notices. Let them do their job.

Tracking Across Households and Caregiving Settings

Many grandchildren grow up between two households. They're with mom and dad some days, with you other days, maybe with a daycare provider or another grandparent too. Each adult sees different things, and that's useful. Your grandchild might be more talkative with you than at home. They might be braver at your house. Different settings bring out different skills.

The problem is that nobody's notes line up. One person remembers a first word, another remembers a first step, and the parents end up with a patchwork. Here's how to fix that without stepping on anyone's role.

Use one shared log the parents control

Ask the parents what they'd like to use. Some families keep a shared note on their phones. Some use a shared photo album with captions. Some just want a text thread. Whatever they pick, you follow it. You don't start your own system and ask them to join.

Script: "Would it help if I sent you a short note after visits with what I noticed? Just a few lines. You can tell me if it's too much or if you'd rather I just mention things in person."

Keep your own backup notes

Even with a shared log, keep a private notebook. Date, age, what you saw, what was new. This is your memory, not a report. It also protects you from misremembering when a parent asks "when did she start doing that?"

A simple entry looks like this:

• Date and age: Oct 18, 2026. Emma is 14 months.
• Setting: My house, afternoon, after nap.
• What I saw: Walked holding the couch, let go for two steps, sat down and laughed.
• What was new: First time letting go.
• What I want to ask the parents: "Has she done that at home yet?"

Five lines. That's it.

Coordinate with other caregivers, through the parents

If a daycare provider or another grandparent spends time with your grandchild, don't set up a side channel. Route it through the parents. They decide who shares what.

Script: "If it's useful, I'm happy to send you a quick note after my days with him so you have it in one place. Would you like that, or would you rather I just tell you in person?"

Share patterns, not one-offs

One missed nap is nothing. Three weeks of short naps is worth mentioning. One quiet visit is nothing. A month of not babbling is worth mentioning. Patterns are what parents and pediatricians can act on.

Send wins, not just worries

If the only notes a parent ever gets from you are concerns, they'll start to dread your texts. Balance it. "She stacked four blocks today and clapped for herself" matters as much as "I noticed she's not pointing yet." Both are observations. Both help.

Don't compare across children

Comparing your grandchild to a sibling or a cousin is the fastest way to make a parent defensive. Compare your grandchild to their own last visit. "She's saying more than last month" is useful. "Her brother was talking more at this age" is not.

If you want a simple handoff routine for the end of a visit, so the parents know what happened and what you noticed, The Grandparent Plan is a free download that walks you through it. You can get it at The Grandparent Plan.

Conclusion

Tracking your grandchild's development is one of the most useful things you can do as a grandparent. It keeps you engaged. It gives you concrete things to notice instead of vague worry. And it makes you a trusted source of information for the parents.

You don't need to be an expert. You just need to pay attention, write it down, and share what you see in a way that helps, not harms. When you do that, you become the grandparent who notices. The one the parents trust. The one who makes parenting easier because you're seeing things they might miss.

Start simple. Keep a notebook. Write down what you observe. Share it with the parents. That's it. Over time, you'll have a record of your grandchild's growth. You'll see patterns. You'll notice progress. And you'll be closer to your grandchild because you're paying attention.

For more concrete scripts, games, and strategies for staying involved without overstepping, visit The Grandparent Advantage's free resources. We've built tools specifically for grandparents who want to be intentional about their role and present in their grandchildren's lives.