A little analog synth for about $30 US
http://www.kilian-nakamura.com/blog-english/This week they’re debuting a cool little Analog Synthesizer SX-150 that is battery-powered and stylus driven, and would look really cool next to my Intellivision. Hook it up to the Mini Theremin kit to make your simple gadget life even weirder.
Of course, the best thing about Gakken is that they’re a publisher, not just a fun gadget maker. Each item they sell is part of a kit that is sold like a magazine, so you can pick these up at bookstores for decent prices. This one runs for about $30, which isn’t all the much more than buying a CD in Japan!