Nice and cheery
Like CodenameBob said, it's cool to hear pizzicato used in such a happy way.
I'm in agreeance with a lot people have said--this would fit so very well on a Sims game, the bass drum could be a little better, but that aside it's a really solid piece. The arrangement of the instruments really works well. You can't listen to this without it bringing a little smile to your face, although I wish there was an overtly happy chord at the very end just to finish it off. xD
Good work all around, though. Nicely done.