Microduino mCookie Magnetic Building Blocks Basic Kit Basic 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, full set of instructions to help create simple projects such as LED microphone Alarm, applause lamp and more