Circuit boards; computer hardware subassemblies for assembling custom electrical and electronic devices; computer hardware kits for making electronic projects consisting of cables, wires, resistors, push buttons, temperature sensors, tilt sensors, LEDs, servo motors, piezoelectric sound components, capacitors, transistors, electric resistors, batteries and electronic connectors hardware and circuit boards for recording, organizing, transmitting, manipulating, reviewing, and receiving text, data, images and audio files.