Warner Bros. has the Scribblenauts Unlimited for the iPhone and iPod Touch in the iTunes App Store for 99-cents (regularly $4.99) for a limited time.

The award-winning, best-selling puzzle game franchise Scribblenauts is back! Imagine Anything. Explore Everything.

Welcome to an adventure into a wide-open world, where the most powerful tool is still your imagination. Help Maxwell solve robust puzzles across dozens of seamless, free-roaming levels by summoning any object you can think of. Or you can apply adjectives to existing objects and magically transform their properties! Then learn the back-story about Maxwell’s parents, 41 siblings (including his twin sister Lily), and how he got his magical notepad.