COMPLETE SET - This building blocks kit for kids includes a maze, hand-crank generator, press switch, push-button switch, reed switch, lamp, LEDs, alarm, and other parts and accessories needed in creating 120 different projects. Requires 3 "AA" batteries. FOR KIDS AGES 8 AND UP - This building blox set are assured to be suitable for children ages 8 and up. Set includes an informational manual to guide your children as they build their very own masterpieces with safety.