It's a site which looks like a rip-off from Neopets, but is MUCH, MUCH better than Neo. It's a lot less crowded, with better graphics. You can have more pets, play more, chat more, earn more and enjoy more. It's not as strict as Neopets and has a team which really tends to take notice of users' complaints or whatever. It's good. I especially love cracking the eggs and getting good fonts!
Tired of Neopets? Try Marapets - it's much more funner!