Get started with drawing circuits on paper. The Basic Kit contains a Circuit Scribe pen six modules a 9V Battery and other accessories (see below for full list). Explore basic circuit concepts like conductivity and work up to creating a touch-sensitive circuit using the NPN transistor. Basic Kit Contains: 6 Modules 9V Battery adapter with 9V battery 2 x Bi-LED SPST Switch NPN Transistor 2-Pin Adapter with 5x resistors (100 1k 10k 100k and 1M ohm) 2 x capacitors (0.1uF 1.0uF) 1 x photo resistor (10k ohms) Additional Items: Conductive Ink Pen Circuit Stencil Jumper Sticker Sheet Steel sheet