(Codename ClickStop is my project within the 30 day product challenge. With ClickStop, you can let small children play on your PC without them damaging anything. It puts a “click-proof membrane” across areas of the screen you don’t want them to click.)
I was thinking about the ClickStop UI, and as it turned out, so was commenter Bracken. Once ClickStop is up and running, it needs to present some sort of UI so that you can control it. But it mustn’t take up any significant amount of screen real estate, because it might get in the way of what your child is doing.
This is exactly the problem faced by Remote Desktop (and VNC, and any other remote access product). The same solution applies, as shown in this (slightly rough, forgive me) mockup:
Cool. It could do the same slide-up-out-of-the-way thing that Remote Desktop does as well, but that’s probably overkill.