An uncle and niece pair up against a mother-daughter duo in a competitive family battle. While one team struggles with the physical challenges, the other team sweeps the board and has an epic run on the obstacle course.

YouTubers, LaurDIY and Alex Wassabi team up with their fans for fun and messy head to head challenges! After a series of trivia questions and messy physical challenges, there's only room for one duo to move ahead to the final round!