The first game (Little Big Planet) was extremely fun and having just played the demo I can safely say the sequel looks even better! However, the main reason I'm such a big fan of this game is because of it's distinct handmade feel.
You play as Sackboy a knitted character who you can dress up, sew buttons on, change the material of and decorate however you want by collecting outfits and accessories through out the game. The game world itself also looks handmade from all sorts of different materials such as cardboard, fabric, wool, and wood. It's like one big craft adventure!
Also when you've finished playing through all the pre-made levels that come with the game, you can use your own creativity to design and build your own handmade adventure using the level creator. (I'm thinking of making a Minifelts level, with little felt characters!)