| Age | Physical | Mental | Emotional |
| 12 - 15 Months | * Stand alone well.
* Drink from a cup (poorly).
* Turn pages in a book (a few at a time).
* play ball by rolling or tossing it. | * Uses four to six words such as "ball", "cracker", or "cookie"
* Can follow a simple command with an associated gesture, such as: bringing a cup to you when you point at it and say "Please bring me the cup".
* Object Permanence: Realizes things still exist when they are out of sight, such as a toy block placed into a closed box. | * Use gestures or words to convey desires, such as: Pointing at a book, raising arms to be picked up, or saying "cup".
* Mimic actions such as covering eyes while playing peek-a-boo. |
| 15 - 18 Months | * Walk well alone.
* May be able to bend down and stand up without help.
* Hold a crayon well enough to scribble.
* Lift cup up to mouth for drinking.
* Climb onto furniture. | * Uses 10-20 words.
* May be able to follow a command without a gesture.
* Stack 2 blocks. | * Greet people with "hi".
* Mimic parental activities such as cleaning up or talking on a phone.
|
| 18 - 24 Months | * Feed self with a spoon.
* Run.
* Climb into a small chair.
* Walk up steps. | * Speaks 20-50 words; understands many more
* Stack 6 blocks
* Understands non-physical relationships such as turning on lights or pushing buttons.
* Sorting toys.
* Searching for hidden objects.
* Problem solving through experimentation. | * Wants to be independent at times. Will throw a tantrum or possibly say no.
* Mimics social behavior such as hugging a teddy bear or feeding a doll.
* Self recognition.
* Self reference.
* Displays attachment.
* Separation anxiety.
* Can play turn-taking games. |
| 24 - 36 Months | * Advanced mobility and climbing skills.
* Increased dexterity with small objects, puzzles.
* Able to dress oneself. | * Speaking in sentences.
* Easily learns new words, places and people's names.
* Anticipates routines.
* Plays with toys in imaginative ways.
* Attempts to sing in-time with songs. | * Knows boys from girls.
* Shows preferences, such as clothes and entertainment. |
