Like the other area, you need to do ‘Stupid Stuff’ Aka Pranks.
1) Knock down the snowboards by the blonde hippie guy.
2) Deface the 3 snowmen, not counting the one the kid is actively touching with the hat.
3) Put the firecracker in the poop by the old lady
4) Become a snowball while talking to Ramon (curly haired kid by the trees in the last area)
5) Hit the tree by the biker when he is sitting at the table near the hockey ring