Gakken EX-150 EX-SYSTEM Electronic Block Introductory Set, an electronic circuit kit that's fun to learn with. Purchased several years ago and only briefly tested for basic functionality. The included "Gakken Electronic Block Secrets" is very easy to understand, making it a suitable educational material for enjoying and learning about electronic circuits. The main unit and the included booklet are in good condition. There is some dirt on the bottom inside of the box (see photo), and when held up to the light, there are some age-related stains and scratches on the outside of the box. Retail price: 12,180 yen #Gakken #Gakken #EX-150 EX-SYSTEM #ElectronicBlock #IntroductorySet #ElectronicCircuitKit