A great and visual effect at an even better price!
You show two blocks, on with red stickers and one with blue stickers. You stack the red block onto the blue block.
You take a stick and show it is solid and pass it thru the holes in the red block. Everything is covered with a little screen but the ends of the stick keep on showing thru the sides of the screen.
You now take both ends in your hand and start pushing the stick down. When you remove the screen it now shows that you have pushed the red block thru the blue block as this is now on the
Comes with everything you need including online video-instructions.