Gakken is perhaps originally known for producing
Denshi blocks and packaging them within electronic toy kits such as the
Gakken EX-System, as far back as the 1970s. One of their original lines, the EX-150, was reissued in 2002, and was so popular as to inspire an
expansion pack. In 1981 Gakken released "Super Puck Monster", a tabletop LCD arcade game that resembled
Pac-Man.
Coleco also licensed "Super Puck Monster" and released it as an official Pac-Man game. Since 1993 Gakken has been publishing monthly logic puzzle magazines under the name
Logic Paradise. ==Book series==