In a parody of Frosty the Snowman, Nigel Thornberry from The Wild Thornberrys narrates as Jimmy Neutron, Cindy Vortex, Sheen Estevez, Libby Folfax, and Carl Wheezer from The Adventures of Jimmy Neutron: Boy Genius all build a snowman that looks identical to Patrick Star. Jimmy decides that the thing to make their masterpiece better than ever is one of his inventions, a top hat-like device that can make inanimate objects come to life (The Spoofinator 4000). When he placed his hat on his head, Patrick says "Birthday Happy!"
After Jimmy places the machine on the snowman and he comes to life, one of two things may happen: in some airings, the kids all start chasing the snowman (when the short abruptly ends), but in other airings, a longer plot begins. The snowman starts annoying the gang to the point that Jimmy decides that the best way to deal with him is to send him seventy years into the future (despite Cindy's suggestion that they just melt him). However, this plan goes wrong due to the snowman finding Jimmy and friends and annoying their future selves. The short then ends with a brief shot of Patrick poking Nigel Thornberry's skeleton, which then causes him to fall apart.
70 Years Later
All the things annoying Patrick did were:
Using Jimmy as a sled.
Sneezing on Cindy
Making Sheen cold at night
Wearing Libby's clothes.
Poking Carl with a stick multiple times.
Happy Go Lively, the music from Squidville can be heard in the short.