Block Party is a game on the Nick website. It is like a free version of Mario Party online, but with Nick characters. Whoever gets the most Gold Coins at the end wins. There are minigames in the game, too.
SpongeBob (SpongeBob SquarePants)
Skipper (The Penguins of Madagascar)
Fanboy (Fanboy and Chum Chum)
Chum Chum (Fanboy and Chum Chum)
Sheen (Planet Sheen)
Dudley (T.U.F.F. Puppy)
Michelangelo (Teenage Mutant Ninja Turtles)
Sam (iCarly/Sam and Cat)
Cat (Victorious/Sam and Cat)
The game has since been retired, however, there are other non-official locations to play it on such as here.