A cross between volleyball and tennis that many families enjoy is badminton. In this game, the object is to use lightweight rackets to volley a "birdie" back and forth over a net. The birdie looks like a little plastic funnel attached to a firm rubber ball. You hold the birdie by the plastic and drop it onto your racket to serve to the other team. Badminton moves more slowly than tennis and is a leisurely way to get moving with the kids. You'll get some exercise, though!