Sevens
For this you need a tennis ball and a wall to bounce it against. (Preferably no windows in it!) And the advantage is you can play this all by yourself. So you start with seven, which is throwing it against the wall, without letting it bounce and catching it seven times. Six: throw the tennis ball against the wall letting it bounce once, and catching it six times. Five: throw the tennis ball against the ground, let it bounce up onto the wall and into your hands five times. Four: throw under your leg against the wall and catch without a bounce (four times). Three: touch the ground with both hands after you've thrown the ball and catch it without a bounce. Two: spin around and then catch the ball twice, without a bounce and finally One: throw, clap your hands, and then catch.