I'm planning on getting these materials from the hardware store I work at an Wally world and making my own medicine ball. A couple questions I have. Has anyone done this? what have you found to be the best method? Smaller sized, do you think a soccer ball or any smaller ball would be able to handle the stress? Any thoughts would be appreciated. BTW this game about because I went to the fitness equipment store today and the damn things are fourty bucks for a 10 lb. one that wasn't gonna bounce.