Adapted from "Ten Second Objects" on the Drama Resource website (http://dramaresource.com/games/warm-ups/ten-second-objects) The original activity is great as is:
"Divide everyone into small groups (4-6). Call out the name of an object and all the groups have to make the shape of that object out of their own bodies, joining together in different ways while you count down slowly from ten to zero. Usually every group will find a different way of forming the object. Examples could be: a car, a fried breakfast, a clock, a washing machine, a fire."