For example, you put a piece of paper or a few peas into a black plastic tube. When the tube is turned upside down, water comes out, and the pieces or peas disappear. A popular trick for the locals, for silencing "know-it-alls," or just for fun...!

Special plastic version with three complete tubes + gimmick, a lid that “takes” a gimmick, two special beads and 6 super routines