Developmental Milestone Source Bright Futures Category Childhood Expected age 72 No additional description of this milestone is available. Represented Developmental Observations IDOB#4823003 Balances on one foot for 10 seconds (preferred) IDOB#4821001 Balances on one foot for 4 seconds (preferred) IDOB#4824009 Hops on one foot 15 times IDOB#4822008 Hops on one foot two to three times IDOB#5039004 Skips