| At… | Most Babies Will… | Some Babies Can… | A Few Babies May… |
| 1 Months | – Respond to a sound, like a bell – Focus on faces – Lift their head |
– Follow an object held several inches in front of their face – Make sounds other than crying, like cooing – Smile when you smile |
– Laugh – Smile on their own – Follow an object from side to side (180°) |
| 2 Months | – Hold their head up for a few seconds – Follow an object – Coo and gurgle |
– Hold their head up at a 45° degree angle – Concentrate on a small object, like a pea – Roll over in one direction |
– Lift their head and chest off of the floor – Bring their hands together – Lift their head 90° |
| 3 Months | – Laugh – Hold their head steady – Squeal in pleasure |
– Recognize your voice – Hold a rattle when it is placed in their hand – Support their lifted chest with their arms |
– Bear some weight on their legs – Reach for toys – Turn towards loud sounds |
| 4 Months | – Support their lifted chest with their arms – Hold upright head steady – Respond when you talk with coos and gurgles |
– Roll over in one direction – Keep head up when pulled to a sitting position |
– Sit unsupported – Imitate sounds – Protest if you take a toy away |
| 5 Months | – Roll over in one direction – Play with their hands and feet – Reach for an object – Bear some weight on their legs |
– Turn toward a voice or new sound – Know their own name – Sit unsupported |
– Pull-up to standing from sitting – Babble – Be afraid of strangers |
| 6 Months | – Sit unsupported – Turn toward a voice – Roll over in both directions |
– Protest when a toy is taken away – Pass an item from hand to hand – Be ready for solids |
– Pick up very small objects with their thumb and finger – Start crawling – Say “mama” or “dada” although not to the correct parent |
| 7 Months | – Imitate speech sounds – Try to get toys that are out of reach – Look for a dropped object |
– Stand while holding onto something – Crawl |
– Wave bye-bye – Play patty-cake – Bang things together |
| 8 Months | – Eat a cookie unassisted – Crawl – Pass an item from hand to hand |
– Crawl well – Point to an object – Say “mama” or “dada” although not to the correct parent |
– Walk while holding onto furniture (cruise) – Understand “no” – Gesture to what they want |
| 9 Months | – Stand while holding onto something – Play Peek-A-Boo – Say “mama” or “dada” although not to the correct parent |
– Play Patty Cake – Cruise – Understand “no” |
– Say “mama” or “dada” to correct parent – Drink from cup alone – Stand on their own |
| 10 Months | – Pick up items with thumb and finger – Wave bye-bye – Understand “no” |
– Gesture to what they want – Stand on their own – Say “mama” or dada” to correct parent |
– Stand freely for a few seconds – Stand alone well – Walk |
| 11 Months | – Say “mama” or dada” to correct parent – Stand alone momentarily – Play Patty Cake |
– Say one word aside from “mama/dada” – Put an item in a container – Understand basic directions |
– Stoop down from a standing position – Walk well – Say three or more words aside from “mama/dada” |
| 12 Months | – Gesture to what they want – Say one word aside from “mama/dada” – Imitate others |
– Walk – Roll a ball back to you |
– Scribble – Pick up an object while standing |
