Build a Solar Mini-Racer - It's a mini vehicle with a simple yet dynamic design run by the power of the sun. You assemble and it races. Solar power is the power of the future! Learn how you convert sunlight into mechanical energy and fun in this build-it-yourself kit. Assembly instructions are straightforward with clear illustrations that make it an easy job. NO BATTERIES NEEDED - Just the sun, baby. Just the sun. For ages 8 and up. WARNING: CHOKING HAZARD - Small Parts. Not for children under 3yrs.