If you haven't heard of this game yet, I'm telling you about it now.
This game is SO addictive. I'm practically glued to my DS now.
Basically you help the little dude solve problems by giving him the tools required to complete it.
You can literally give him anything you can think of.

If he needs to reach something up on a cliff, you can type in "pegasus" and a pegasus will appear on the screen and you can give it to him so he can fly up and get it.
Or you can type in "helicopter" and he can use the helicopter to fly up there.
Or you can give him a trampoline to jump up there with.
Or a rocketpack. Or a pterodactyl. Or wings.

Or if there are a lot of dangerous critters between you and your goal, you can put a kraken of a trex or a cthulu to kill everything so our little hero can go get it.

If you like puzzle games, then you'll love Scribblenauts.
That's about all I'm gonna say about it.
Now, if you'll excuse me, I gotta go blow up the wall so I can get on my pterodactyl and fly past the bear and lasso the boulder out of the way.