I'm looking for a Windows shell replacement, which should have the following features:
Kids-friendly and kids-proof. Just a list of icons for programs that can be executed, everything else should be hidden or password-protected.
Low resource usage. It is going to be used on a computer with 512MB RAM.
Windows XP compatible.
I've looked into different Windows shell replacements, like Rainmeter or Emerge Desktop, but they all seem to be overkill and made for a power user. I need something that is very simple and lean, to be used by an 8 year old kid.