This is a brilliant and colourful prop for the kids entertainer or clown. Three coloured balls are placed into a clear (inner) tube covered by a white (outer) tube. When the outer tube is lifted the balls have changed their order. This is repeated and each time they change order.  Finally, in desperation, the magician places two ball into the tube, the remaining one is placed into a small box.  A magic word is said and the box opened to be shown empty - the tube lifted revealing all three balls in the correct order.