I've been thinking along those lines, with some external GPIO pins hooked up to toys and simple commands to control them. So the kid could type "ON 4" and the

I've been thinking along those lines, with some external GPIO pins hooked up to toys and simple commands to control them. So the kid could type "ON 4" and the pin labeled 4 hooked up to a light would turn it on. Or "VOLUME 3" to set the volume of the sound output. File system commands like LS, CD, and PLAY <name> to play a music file to sound out. Maybe more commands that control RC channels where you have lots of flexibility on what you put on the other end.