Combine a host of sensors and action blocks to build your own robotic creations. The Cubelets TWENTY kit includes: • Action Cubelets: 2 Drive, 1 Rotate, 1 Speaker, 1 Flashlight, 1 Bar Graph • Sense Cubelets: 1 Knob, 1 Brightness, 2 Distance, 1 Temperature • Think Cubelets: 2 Inverse, 1 Minimum, 1 Maximum, 1 Battery, 2 Passive, 2 Blocker • Accessories: 1 Charger