How to Make a Tire Rocker. Here's a cute way to recycle those old tires in your garage, Build your kid a rocker for him to enjoy! Find yourself an old tire, clean it very well and measure and find it's center.
Interesting idea for putting a play area on asphalt, concrete or hard soil in a temporary build. The tires and rocks can be removed, and the sand and rocks swept up. Interesting idea for day cares in urban settings without access to grass or soil.