Getting the presents the kids are guarding
In Whoville, there are little kids who are guarding presents that give you 10 points. They are dancing to the music that the little horn thing beside them is making. If you shoot the kid with the Rotten Egg Launcher, the kid will go away. You cannot get the present while the music is playing. Slime the horn with the Slime Gun, then you will be able to get the present.