| Age | Skill |
| 4 months | Rolls from front to back |
| 5 months | Rolls from back to front |
| 6 months | Sits with support |
| 9 months | Pulls to stand |
| 12 months | Walks independently |
| 18 months | Runs |
| 27 months | Walks up stairs (both feet on each step) |
| 36 months | Walks up stairs alternating feet |
| Rides tricycle | |
| 4 years | Hops |
| Walks up and down stairs alternating feet | |
| 5 years | Skips |
| 6 to 7 years | Rides bicycle without training wheels |
