The Maker Kit comes with a range of components that you can use to create cool circuits! Connect the LEDs in parallel or series, use capacitors to fade them on and off, or make a paper touch sensor with the NPN transistor. Kit comes with 1x Conductive Ink Pen, 1x Blinker, 1x Potentiometer, 1x Photo Sensor, 1x RGB LED, 1x Buzzer, 2x Bi-LED modules, 1x SPST switch module, 1x 9V battery module with battery, 1x NPN transistor, 1x 2-pin adapter with photo resistor, capacitor and resistors accessories, 1x stencil, 1x jumper sticker sheet and 1x steel sheet. The Circuit Scribe Workbook + Sketchbook is also included.