Must Restrict PCs to just ONE Website - How??



I KNOW it can be done ..
However, in my attempts, Ive extended the perimeter of my bald spot by about 30%! <sigh>

I have 3 laptops, all of them need to access just ONE specific Website, no other sites. Infact, we dont need, any email, any sound, ...) Id prefer to remove the Hard drive and just have them boot up from a CD, That way I dont have any problems about Anti-Virus software, Hard Drive Failures, etc ... They are just outdated laptops with built in Wireless LAN

What Id prefer - is if a guy could make a Bootable CD, (either with the Windows product thats in them, or something like "puppy linux" for example) and just have a way to use something like firefox or what comes with pupply linux that could limit the access to that one single website.

Can someone please give me some ideas, or
(Hint: Better yet!... an .ISO I can download from somewhere would be AWESOME! -
(I was thinking about Puppy Linux, but I dont know enough about Linux, or Coding to make it happen)

Happy New Years!