You've seen the others...now take a look at the Bicycle Lightshow Roller that attaches to the axle and displays a 360 degree lightshow! This Lightshow Roller not only looks great, but it also attracts attention, which enhances biking safety! Easy to install, fits most spoke wheels of all sizes...with no tools required! With its waterproof construction and long battery life LED lights, you will enjoy this lightshow for years to come! And batteries ARE included! Type: Kids Size: Medium Color: Multi-Color Color Mapping: Multi-Color Age: Child