Electronics Playground 130 is a classic electronics trainer for expanding the depths of electronics understanding. It uses the spring/wire connection method for quick and easy modifications and trouble shooting. Learn basic principles of electronics and electricity, physics and magnetism. Comes with built-in speaker, 7 segment LED display, two fully integrated circuits and rotary controls. Complete AM broadcast station, Electronic Organ, LED strobe light, Timer, Logic Circuts and much, much more. Also includes an Easy-to-read, illustrated, lab style manual. 6 AA batteries are required but not included.