So maybe we missed this when we talked about LineRiders. Strange. I thought I had heard of similar stuff before. Maybe LineRiders have more features.
These little truck things follow lines drawn on a white surface using patented "Opti-track" technology. Priced at $14.95, these things will be great for the kids. Hand them a marker, point at the kitchen tile, and let them go to work. You'll have a veritable Trackerz rally going on in no time. Then they'll draw on the dog. [Thanks, Raul]
Product Page [WonderfullyWacky]