- Different sizes of cardboard tube, the longer the better.
- Small cars or balls
- Balance one end of the tube on a couch, stool, pillow, etc..
- Put the other end of the tube on the ground so that the tube is angled downward like a slide.
- Put balls, cars, etc.. in the tube at the top and watch them come out at the bottom.
- For a more permanent structure, cut holes through a box and push the tubes through at various angles.