• Follow a moving object with their eyes by 3 months
• Bring objects to their mouth by 4 months
• Control head when pulled to a sitting position at 4 to 7 months
• Respond to sounds at 4 to 7 months
• Babble and begin to say "Ma-Ma", "Da-Da" with meaning at 8 to 12 months
• Stand with support by 8 to 12 months

Most babies 12 to 24 months can...

• Understand simple directions
• Wave bye-bye
• Stack at least 2 small blocks
• Scribble with a crayon
• Walk with or without support
• Finger feed self and begin using spoon or fork

Most toddlers 24 to 36 months can...

• Combine 2 to 3 words
• Use 50 words
• Point to pictures in a book
• Stay with a task for 6 to 7 minutes
• Place simple shapes in a puzzle
• Walk up stairs without help