Birth
When held prone knees under abdomen
6-8 weeks
Briefly hold head up when held prone
3 months
Holds head up
4-5 months
Reaches out for toys
6-9 months
Lifts head spontaneously from supine
Sits with support
Crawls
10-12 months
Cruising furniture
13 months
Walks
15 months
Walks alone
18 months
Walks well
2 years
Jumps with 2 feet together
Throws overarm
3 years
Rides a tricycle
Up and down stairs adult fashion
4 years
Stands on 1 leg for 4 seconds
5 years
Skips