They can learn to make a charm trick that an empty box becomes again full, so watch this how ton video. They need a box Cola, piece of paper, black Texta, shears and a marker. They cut the paper best can the mouth fit, put you a hole behind the mouth can, and express you approx. 2/3 of the box. Checks out this video magic Tutorial and learn, like one the illusion, fill an empty to provide to be able...