Scott Hanselman is working on a new project for parents out there called Baby Smash:
As babies smash on the keyboard, colored shapes, letters and numbers appear on the screen. Baby Smash will lock out the Windows Key, as well as Ctrl-Esc and Alt-Tab so your baby can't get out of the application. Pressing ALT-F4 will exit the application and Shift-Ctrl-Alt-O brings up the options dialog.
Its written with WPF, and looks pretty cool, as well as pretty useful. I don't have kids, but a coworker of mine just recently had his second child, and his first is 2 and pretty rambunctious from what I understand. So I sent him a link to the program. Here was his response:
Does he have any programs that will prevent my kid from drawing on the walls? :)
Hey... computers can't do everything you know.