Building is fun, teaches fine motor skills and E-Blox® are not your ordinary building blocks. They bring your creations to life and light up your buildings. E-Blox® patented technology consists of tin-plated blocks which connect to a battery block, powering the electrical component blocks. The blocks integrate electronic circuitry into your builds so there are no wires to bundle and hide. Super fun and educational. Color Chemistry Lab Set The Crayola Color Chemistry Set for k