It is available for GNU/Linux, Mac OS X and Windows. Binaries compiled for Microsoft Windows and Mac OS X are distributed with a restricted number of activities; it is possible to access all the activities for a fee.
The first version of the game was made in 2000 by Bruno Coudoin, a French software engineer. Since the first release it was distributed freely on the Internet and was protected by the GNU General Public License. The motivation behind the development was to provide native educational application for Linux. Since then, the software has seen continuous improvements, in terms of graphics and number of activities, thanks to the help of many developers and graphic artists joining the project over the years.