Painted Ball Run
Watching the balls tumble is a lot of fun for this 4-year-old, even more so because he helped to build the ball run himself.
Using ping pong balls in a cardboard 'marble run' works really well because of the way these lightweight balls bounce and move. But don't take our word for it - build your own cardboard ball run and experiment with different balls that you have at home.
Thanks to @life_with_little_loves for this fantastic creation.
