Microduino mCookie Magnetic Building Blocks Advanced Kit Includes 4 modules: 1 core USB module, 1 Bluetooth 4. 0 module, 1 battery management module Sensor hub module, 6 sensors: 2 LED color sensors, 2 crash/impact sensors, 1 buzzer sensor 1 microphone sensor, plus additional sensors and instructions to create more advanced projects Such as teeter-totter, music box, joystick, electronic puppy, thermometer, hygrometer and more