Pulls toys behind him while walking

Carries large toy or several toys while walking

Begins to run stiffly

Walks into ball

Climbs onto and down from furniture unsupported

Walks up and down stairs holding on to support

Scribbles spontaneously

Turns over container to pour out contents

Builds tower of four blocks or more

Completes simple knobbed wooden puzzles of 3 to 4 pieces

Says

Follows simple, one-step instructions

Says several single words

Recognizes names of familiar people, objects, and body parts

Points to object or picture when it's named for them

Repeats words overheard in conversations

Uses two-word sentences

Will listen to short story book with pictures

Identifies one body part

Begins to sort shapes and colors

Begins make-believe play

Walks alone

Starts to feed self with spoon, with some spilling

Likes to play with food when eating

Can put shoes on with help

Can open doors with knobs

Can drink from open cup with no assistance, with some spilling

Imitates behavior of others, especially adults and older children

Enjoys playing alongside other children

Likes to do things for himself

Begins to show defiant behavior

Developmental Checklist (12 to 24 months)