The tin plated parts in this set are conductive so they can be used to create 3D circuit paths from the battery module to the LED modules provided in this set to integrate lights into you structures. Online instructions show you how to build a 10 different crazy action racers including a fan car, silly spinner, mobile fan launcher & more! STEM education – Science, Technology, Reading and Writing, Engineering, the Arts, and Math – through the joy of play and discovery. Electronic Building Blocks: Have fun while learning with E-Blox’s educational building blocks. Our interactive building blocks promote creativity, imagination, and a love for science. The electronic building blocks are a great way to keep your children entertained and focused. POWER BLOX: E-Blox are not your ordinary building blocks. The LED building blocks can not only be used to build your creations, but they can also bring them to life! E-Blox use our patented technology, which consists of tin-plated blocks (Power Blox  line) that connect to a battery block, powering the electrical component blocks. The plated blocks used in our Power Blox line allow you to seamlessly integrate electronic circuitry into your builds so there are no wires to bundle and hide. Soon you will be able to add motors, speakers, amplifiers, wireless connectivity, and sound effects to your Power Blox  sets, just to name a few. Start creating today with E-Blox’s LED building blocks!