Three is when the toddler era closes and the era of why, wonder, and pretend opens. They start playing with other children rather than alongside them, and they begin telling stories about themselves, which is the beginning of a life they will actually remember.
What they need from you: Someone who takes the story seriously. This is the age where lasting memory switches on, so what you do now, they keep.
Month by month
What is happening at each age
24 developmental notes across 3 to 5 years. Open any age to see what is typical and what it means for you.
3 years 1 months
The "why?" era is fully open. It can be 100 questions a day, and every one is a brain wiring itself. When you don't know an answer, say "Let's find out together." That's the best answer there is.
3 years 2 months
Three-year-olds can take turns now, briefly, with support. Simple board games and "your turn, my turn" play build the patience muscle. Lose graciously. They're watching how you do it.
3 years 3 months
Scissors (the safety kind), playdough, big crayons, fine motor skills are under construction. Art at your kitchen table doesn't need to be good. It needs to be displayed. Get the magnets ready.
3 years 4 months
Pretend play has full storylines now: doctor, restaurant, superhero. When you play a role they assign you, and really commit, you're telling them their inner world matters. Be the dragon. Be a great dragon.
3 years 5 months
They can tell you their full name, their age on fingers, and stories that are 80% true. Memory is blooming. Start a tradition worth remembering, this is roughly when lifelong memories begin to stick.
3 years 6 months
Three and a half: hopping on one foot is coming, fears may bloom (dark, monsters, dogs). Take fears seriously without amplifying them. "I'll check with you" beats "there's nothing there."
3 years 7 months
Questions are getting deeper: where does the sun go, what happens to bugs that die. You don't need perfect answers, you need honest, calm, simple ones. Grandparents are allowed to say "I wonder too."
3 years 8 months
Catching a big ball, climbing playground ladders, pumping legs on the swing (almost). Outside time with you is gold, nature plus an unhurried grown-up is a developmental jackpot.
3 years 9 months
Rhyming games are clicking, cat, hat, bat, and they're a real predictor of reading readiness. Dr. Seuss and silly made-up rhymes aren't just fun. They're phonics in disguise.
3 years 10 months
They're drawing people now: a head, legs, maybe arms sprouting from the face. Ask "tell me about your picture" instead of guessing what it is. (Trust us on this one.)
3 years 11 months
Almost four. Cooperation, negotiation, and the occasional outrageous fib, lying at this age is imagination testing its wings, not a character flaw. Stay light. Stay curious.
4 years
Four years old! Hopping on one foot, telling stories, playing make-believe with friends, asking questions that stump adults. Four is widely considered peak magic. Soak in every minute of it.
4 years 1 months
Four-year-olds love jokes, mostly terrible ones. Laughing at their joke teaches them they can bring you joy. That belief, planted now, is what brings teenagers back to your kitchen later.
4 years 2 months
Counting ten objects, recognizing some letters, maybe the ones in their name. Point out their letter everywhere: cereal boxes, street signs. The world becomes a treasure hunt.
4 years 3 months
Friendships are becoming real and named: "Mia is my best friend." Ask about their friends by name and remember the answers. Knowing their people is knowing them.
4 years 4 months
Emotional vocabulary is growing, they can say angry, sad, excited, scared. Help it along: "You seem disappointed." Kids who can name feelings learn to manage them. It's that direct.
4 years 5 months
Galloping, skipping (attempting), somersaults, standing on one foot for seconds at a time. Their body is their first instrument and they're learning to play it. Applaud the recitals.
4 years 6 months
Four and a half: "what if" questions, elaborate pretend worlds, and rules, inventing them, enforcing them, renegotiating them mid-game. Playing by THEIR rules is a masterclass in their mind.
4 years 7 months
They can retell a story now, beginning, middle, end. Ask them to tell YOU the bedtime story sometimes. Narrative skill predicts reading comprehension, and their version will be better anyway.
4 years 8 months
Writing their name (or a bold attempt), drawing recognizable things, cutting on a line. A letter mailed to YOUR house with their name on it deserves a frame, and a letter back.
4 years 9 months
Big questions about fairness arrive: "That's not FAIR!" is moral reasoning, version 1.0. Take it seriously, "You're right, that doesn't seem fair. What would be fair?" builds an ethical thinker.
4 years 10 months
Kindergarten is on the horizon and they can feel it. Talk it up: school is where big kids learn amazing things. A grandparent's confidence is a borrowed backbone.
4 years 11 months
Almost five: buttons, zippers, maybe a bike with training wheels. Independence in small skills is confidence in large ones. Wait the extra 90 seconds. Let them finish it themselves.
5 years
Five years old! Counting to 20, hopping and skipping, telling elaborate stories, ready (or nearly) for kindergarten. The launch into the school years begins, and they need their cheering section more than ever.
Gran Dates
Things to actually do together
24 ideas matched to this stage. Each one has a free version and a version worth spending on, because the free one is usually the one they remember.
3 years 1 months
Pretend play has plots now, join the cast. Free: play restaurant at home; they cook, you order, tip in hugs. Treat: a real diner breakfast where THEY order, pancakes taste better when you said the words yourself.
3 years 2 months
Collecting and sorting is how preschoolers do science. Free: a nature collection box, walk, gather, sort, display on a shelf at your house. Treat: a natural history museum trip, dinosaurs are about to become a personality trait.
3 years 3 months
Letters are becoming friends, especially THEIR letter. Free: a letter hunt, find their initial on signs, boxes, and license plates. Treat: a chunky alphabet puzzle for the Gran's-house toy shelf.
3 years 4 months
Cozy and dark plus a flashlight equals magic. Free: build a blanket fort and tell stories inside by flashlight. Treat: a planetarium kids' show, the biggest blanket fort there is.
3 years 5 months
Their opinions are hilarious and worth archiving. Free: a video "interview", favorite food, scariest animal, what Gran does all day. Treat: their first movie matinee, small theater, big popcorn, aisle seat for intermissions.
3 years 6 months
Why-questions deserve experiments. Free: sink-or-float in the kitchen sink, predict, test, marvel, repeat. Treat: a children's science center, button-pushing as a legitimate learning method.
3 years 7 months
Kindness is learnable by doing. Free: bake something together and deliver it to a neighbor, generosity with sprinkles. Treat: a cupcake-decorating session at a local bakery.
3 years 8 months
Wheels are the new frontier. Free: a trike-and-walk parade around the block, streamers optional but encouraged. Treat: a balance bike or a proper helmet picked out together, safety with style.
3 years 9 months
Rhymes are pre-reading in disguise. Free: silly rhyme battles, cat, hat, splat, the more absurd, the better. Treat: a bookstore date: they pick any rhyming book, you do all the voices forever.
3 years 10 months
Art is conversation at this age. Free: draw portraits of each other, then hang the gallery on your fridge. Treat: paint-your-own-pottery, a mug made by their hands beats anything from a store.
3 years 11 months
Watching wildlife builds patience and wonder. Free: make a pinecone-and-peanut-butter bird feeder for your window. Treat: child-size binoculars, junior birdwatcher, reporting for duty at Gran's window.
4 years
Four! Interview year four, expect philosophy. Free: film the Birthday Interview, same questions, sharper answers. Treat: kiddie rides at a fair or amusement park, their first "big kid" thrill, your hand available.
4 years 1 months
Jokes are currency now, terrible ones especially. Free: a joke swap; laugh at every single one like it's Carson-era material. Treat: an ice-cream taste-test outing, three flavors, official scorecards, rigorous methodology.
4 years 2 months
Counting is a superpower they want to use everywhere. Free: a counting walk, steps, dogs, red cars, cracks. Treat: start the coin jar: a piggy bank and the first handful of coins to sort and count together.
4 years 3 months
Hosting is big-kid pretend at its finest. Free: a tea party where their stuffed animals are the guests and you're the co-host. Treat: a real "fancy" hot chocolate out, whipped cream, pinkies up.
4 years 4 months
Naming feelings takes practice, make it a game. Free: feelings charades, act out happy, grumpy, surprised; guess and giggle. Treat: a kids' concert or sing-along show; big feelings, set to music.
4 years 5 months
Climbing, swinging, balancing, mastery feels amazing. Free: a playground tour: try a NEW park and rate it together. Treat: a kids' gymnastics or ninja-course drop-in class.
4 years 6 months
Inventing rules is how they practice thinking. Free: let them invent a brand-new game and teach it to you; play by THEIR rules. Treat: their first real board game, the gateway to a lifetime of game nights at Gran's.
4 years 7 months
Your childhood is their favorite mythology. Free: tell stories of little-you with props, photos, objects, the older the better. Treat: take them to a place from your childhood, your school, your street, your favorite spot, plus lunch.
4 years 8 months
Mail is magic when you're four. Free: start the mail ritual, send them a letter; help them "write" back when together. Treat: a stationery set with their name on it, official correspondent credentials.
4 years 9 months
Where food comes from is a fascinating mystery. Free: harvest or water the windowsill garden; taste what you grew. Treat: a farmers market date with five dollars of their very own to spend.
4 years 10 months
Kindergarten is coming, confidence is the curriculum. Free: play "school" where they're the teacher and you're the (slightly naughty) student. Treat: pick out the first lunchbox or backpack together, Gran's send-off gift.
4 years 11 months
Self-care skills are conquest-worthy. Free: hold the Zipper-Button-Shoe Olympics with medals (drawn) and ceremonies (dramatic). Treat: a first round of mini golf, 18 holes of wildly creative scorekeeping.
5 years
Five! Interview year five, kindergarten edition. Free: film it, and add one question: "What do you want to learn this year?" Treat: a Big Kid Day Out they design, you supply the tickets, they supply the itinerary.
Milestones are ranges, not deadlines. Everything here describes what is developmentally typical, and two children can reach the same milestone many months apart and both be entirely on track. Nothing on this page is a diagnosis, a screening tool, or medical advice. If you have a concern about a child, that conversation belongs with the child's parents and the child's pediatrician.
Rather not look this up every time? The Milestone Message texts you your grandchild's milestone as it happens, and The Gran Date sends one thing to do together on the 15th of every month. Both free.
Not sure what kind of grandparent you are becoming? Take the five-minute quiz.
Last updated August 20, 2026. Reviewed for accuracy against current developmental guidance.