Toys play a crucial part in development of a child Toys as simple as wooden blocks or numbered puzzle develops cognitive and physical skills Complex puzzles remote control cars bubble guns helps learn and analyse cause effects and spatial relationships Babies tend to play more and more with such toys and make themselves happy Children s attitude towards their toys nurtures them big way Features . Add Motors Lights and Switches. Stimulate young minds with creativity imagination and science. Light up your 3D circuits with our unique power block. Great addition to any STEAM curriculum. Patented Technology you won t find in any other toy brick set. No Wires Build circuits directly into your projects. Use your own imagination to create awesome structures. Compatible with other toy brick sets. Enhance and bring lights to your LEGO sets. Contains over 58 parts including 10 LED s. One 1 9V Battery Required. In Specifications . Weight 1 7 lbs