Would you like to try a sponge ball trick? It's bluffing and easy to do! Here is the effect: you put a sponge ball in your hand and the ball disappears. This effect is amazing! It's up to you.  

For young and old alike, this routine is very ingenious, easy and extremely punchy. A cork stopper cut in four is placed at the four corners of the magician's mat. A piece of cork is covered with a napkin and this same piece disappears to join a new corner... Little by little, all the corks gather in the same corner of the mat!