Nickelodeon has SpongeBob Moves In (iTunes Link) for the iPhone, iPod Touch, iPad in the iTunes App Store for FREE (regularly $3.99) for a limited time.

Dive into Day 1 of SpongeBob’s life in Bikini Bottom! Move him into his Pineapple house, get a job at the Krusty Krab, and build your very own Bikini Bottom! As your town turns into a thriving undersea city, you’ll unlock new characters, buildings, decorations, and areas like Jellyfish Fields. Monthly updates include quests, decorations and buildings!