I bought this a couple of years ago and since then there has been zero development as far as I can see; the developer asks you to sign up for beta programs above, but I certainly never received any response.

The software fails in one big respect- as noted below it doesn't actually 'kid proof' the computer, it also fails to remember preferences from launch to launch. Expose and Dashboard keys aren't intercepted.

I've switched to Kidlock, which for me is rather more fun (and for the kids)