From Castor Studios:
Keyboard Smash is designed to allow young children to play for the first time with a keyboard and mouse while at the same time not endangering the operating system and file contents. Traditionally parents would have to monitor computer usage since children could inadvertently perform undesired tasks such as rebooting the PC, deleting files, start programs, crash the operating system. Keyboard Smash eliminates all of these issues and more by isolating itself from the rest of the operating system to create a safe environment for young ones to have fun. Designed to stimulate children by linking actual keyboard letters to matching objects and sounds, Keyboard Smash brings a fun new activity for youngsters to enjoy.