I got into Scribblenauts with Unlimited, and it's fun for a bit here and there. I think the most interesting thing is finding funny solutions to problems, not the most obvious ones. However, if you're looking for any challenge, don't bother, it's really easy. Rarely did I have to think about the right solution for any length of time.
@hystavitoRecently, I played Scribblenauts and it was very original, mainly the gameplay mechanics and this looks as charming and fun.