Add Bluetooth app control to any build with the Circuit Cubes Bluetooth Upgrade Kit! This kit comes with a Bluetooth Battery Cube, two Cubit Motors, and a total of 36 parts (bricks, wheels, gears, axels, connection wires). Combine this launch kit's contents with your imagination and existing LEGO parts to create your vehicle, mech monster, and other animated creations! Just launch the Circuit Cubes App and open the Bluetooth screen by tapping on the icon in the upper right. Once you pair the Bluetooth Cube with your smartphone or tablet, the LED turns blue. You are now in remote control of any of the three outputs with the app. Included: • Bluetooth Battery, Cubit Motors (2) • Bricks, axles, rims, treads, pins, gears, & wires • Seamless circuit connectivity (no soldering) • Safety tested & approved for ages 8+ • Created by STEM teachers, tested & approved by kids