Clear some space, get the skipping ropes or hula hoop out and have a contest!
Who can skip or hula the most times in a row?
Put on some relaxing music, and get the kids to stretch, and try to touch their toes without bending their knees, bend one leg backwards and hold their foot with their hand, or twist from side to side without moving their feet.
The Tree pose is a good yoga pose to start kids off with, it helps with balance and breathing.
Next try the Cat pose where you are on your hands and knees, lower your head and arch your back gently, then raise your head and curve your back the other way.