The Chalktrail from Fat Brain Toy Co., is a new toy that combines bike riding with chalk creations. A simple wishbone clamp connects the Chalktrail device to center hubs of the back wheel of the bike then chalk is inserted into another simple squeeze clamp at the other end of Chalktrail. The device can be attached to bikes of all sizes and to training wheels. Kids and adults alike can create colorful designs as they ride. The package includes the Chalktrail connector and one piece of non-toxic, washable chalk. One piece of chalk lasts a total of 1.5 miles, and replacements are sold separately.