Twins go up against brothers as they face a number of messy challenges that feature wet nappies and water shoes.

Best friends face off against cousins as they take on a series of squirting, throwing, and stacking challenges.

Only one team get to go to the bonus round when a team of best friends go up against stepbrothers in edible challenges.

Two teams compete in a range of messy games, featuring the water balloon and egg toss. However, only one team gets a shot at the obstacle course.

Siblings go up against best friends in a number of tossing games. Both teams find that they need to practice their aiming skills, before one team makes it through to the obstacle course.

Two teams of best friends take each other on in a series of wet, slippery, and balloon-popping challenges for a place in the final round.