Any level stretch of driveway or blacktop can become an extreme sports venue with a few easy touches. Customize your course with what you've got in the garage -- and be imaginative! We used cones, sidewalk chalk, a sprinkler, and (going off-road) a ride-through arch made from pool noodles, duct tape, and dowels stuck into the ground at the edge of the driveway. We also had the kids dismount their bikes to crawl through a cardboard-box tunnel and a tent, whack a tee ball, and shoot a basket.

The most important part of the race: the wave of the checkered flag at the end (print our paper version or pick one up at a party store), followed by a rousing cheer from the crowd.

For more Freewheeling Fun and games, check out these creative bicycle challenges.