Normal motor milestones

Action Age
Sit without support 6-8 months
Creep on hands and knees 9-11 months
Cruise/bottom shuffle 11-12 months
Walk independently 12-14 months
Climb up stairs on hands/knees 15 months
Run stiffly 16 months
Walk down steps - non-reciprocal 20-24 months
Walk up steps 3 years
Hop on one foot 4 years
Skipping 5 years
Balance on one foot 20s 6-7 years