| 2 months | Holds head up while on tummy; moves both arms and legs | Opens hands briefly | Makes sounds other than crying; reacts to loud sounds | Calms when spoken to or picked up; smiles when talked to; looks at your face |
| 4 months | Holds head steady without support; pushes up onto elbows/forearms when on tummy; swings arms at toys | Holds a toy when placed in hand; brings hands to mouth | Coos ("ooo," "aahh"); takes turns making sounds; turns head toward voice | Smiles on his own to get attention; chuckles; makes sounds/movements to keep your attention |
| 6 months | Rolls from tummy to back; pushes up with straight arms on tummy; leans on hands to support sitting | Reaches to grab a toy; puts things in mouth to explore | Takes turns making sounds; blows raspberries; makes squealing noises | Knows familiar people; likes to look at self in mirror; laughs |
| 9 months | Sits without support; gets to a sitting position by herself | Moves objects from one hand to other; uses fingers to "rake" food toward himself | Makes varied sounds like "mamamama," "babababa"; lifts arms to be picked up | Shy/clingy with strangers; shows facial expressions (happy, sad, angry); looks when name called; reacts when parent leaves; plays peek-a-boo |
| 12 months | Pulls up to stand; walks holding onto furniture | Picks up objects with pincer grasp (thumb + pointer finger); drinks from cup with help | Waves "bye-bye"; says "mama/dada" or another special name; understands "no" | Plays games like pat-a-cake |
| 15 months | Walks independently | Stacks at least two small objects/blocks; uses objects correctly (phone, cup, book) | Tries to say 1-2 words besides "mama/dada"; follows directions with gesture + words; points to ask for something | Copies other children; shows objects she likes; claps when excited; hugs stuffed toys; shows affection |
| 18 months | Walks up steps with help; runs (emerging) | Scribbles; uses spoon | Says at least 10 words; tries to name pictures in a book; follows 1-step verbal instructions | Moves away from caregiver to explore but checks back; points to show something interesting; puts hands out to be washed |
| 24 months (2 years) | Runs; kicks a ball; walks (not climbs) up a few stairs with/without help | Holds something in one hand while using the other; uses switches/knobs on a toy; eats with a spoon | Points to things in a book when asked; says at least 2-word phrases ("More milk"); names at least 2 body parts; uses more gestures (nods yes, blows a kiss) | Notices when others are hurt/upset; looks at parent's face to gauge reactions in new situations |
| 30 months (2.5 years) | Jumps off ground with both feet | Twists doorknobs/unscrewing lids; takes some clothes off; turns book pages one at a time | Says ~50 words; uses 2+ words with an action word ("Doggie run"); uses pronouns "I," "me," "we" | Plays next to and sometimes with other children; shows off ("Look at me!"); follows simple routines when told |
| 3 years | Rides a tricycle; balances briefly on one foot | Strings large beads; puts on loose pants/jacket; uses a fork; draws a circle when shown | Converses with 2 back-and-forth exchanges; asks who/what/where/why questions; says first name; speech mostly understandable to others | Calms within 10 minutes after caregiver leaves; joins other children to play |
| 4 years | Hops on one foot; catches a bounced ball | Uses scissors; draws a person with 3 or more body parts | Says sentences of 4+ words; tells stories; names some colors and numbers; sings songs or poems from memory | Pretends to be something else (teacher, superhero); asks to play with other children; comforts others who are hurt/sad; adapts behavior to setting (library vs. playground) |
| 5 years | Hops on one foot; skips; balance improves | Buttons some buttons; writes some letters of her name | Tells a story with at least 2 events; answers questions about a book; keeps conversation going >3 exchanges; uses/recognizes simple rhymes | Follows rules and takes turns in games; sings, dances, or acts; does simple chores at home |