It's free, so why not?
Media Molecule have released a new Santa costume for Sackboy in LittleBigPlanet. It's free, which is nice. So yeah, go get it. Once you've done that, be sure to check out this list of Christmas-themed maps available for download.
Any LBP players out there had a go with the maps yet? Any recommendations?
LittleBigPlanet update: Santa is coming to LBP! [PlayStation Blog]