duck walk

Find an open space. Stand across from your child. Make duck wings with your arms by holding your hands under your armpits. Bend at the knees and squat. Spread out your toes like webbed duck feet. Start walking around, heel to toe, using your entire foot, in straight lines, in circles, however you'd like. Flap your wings, and encourage your child to quack like a duck. Do this for as long as you can until you tire out.

This is excellent for hip flexibility, leg strength, and coordination.