Last year belonged to poop, and this year brings the rise of the butts. WowWee, the company behind Fingerlings, launches Buttheads this month, a series of 4-inch fart prank novelty figures.

The electronic collectibles are available at mass retail, drawing kids in with colorful packaging and a tagline that says it all—”Buttheads: Their Heads are Butts!” The four characters in wave one include Tushi (Master of the Martial Farts), Robutt (Artificial Inflatulence), The Grim Ripper (Silent But Deadly), and Brainfart (The Farting Dead).

Kids can pull each Butthead’s finger to activate fart sounds and battle mode to compete in disciplines including stank score, loudness, and staying power.