Right now, I am very fascinated with cardboard. There are just tons and tons of things that you can do with cardboard. I have used bits and pieces of cardboard to make gift tags and other crafts. I have also seen some really creative blogs which use cardboard boxes as toys for kids. So, if you are into diy and would like to use some cardboard boxes as toys, you may want to check out Rolobox.com. It is a reusable set of wheels and brackets that can be fitted onto any cardboard box. Just use the wheels to create a cart, car, train, bus and more.