30-In-One Electronic Kit

A simple electronic kit safely teaches the basics of electricity and electromagnetism.
Teaches the functions of transistors, diodes, resistors, capacitors, circuits, and more about electronics in the fun way.
Includes all parts needed to build 30 exciting electronic projects.
You can build a touch bell, electronic switch, motor speed control, night light, railway warning device, timer, alarm clock, automatic door, burglar alarm and much more.
Well-assembled components enable you immediately enjoy experimenting on different projects.
Safe, easy solderless coil-spring assembly.