You know the old adage that kids have as much fun with the packaging as they do with the toy it contains? Here's yet another clever example; look what you can do with one large flat box and few large cardboard tubes cut in half.
If you've got some cardboard tubes (or paper towel tubes would work) and a large piece of cardboard, you're in business. You'll have the little ones busily learning about gravity for hours.
Read more: A Happy Wanderer
MORE BALL RUNS ON APARTMENT THERAPY:
• Three DIY Marble Runs
• Scott Weaver's Rolling Through the Bay Toothpick Ball Run