You can use people that should compete but use these colors on the list

White

Light Gray

Gray

Black

Brown

Red

Orange

Yellow

Lime

Green

Cyan

Light Blue

Blue

Purple

Magenta

Pink

The goal is to push any member off but you each 3 lives. If you fall, that's a life gone. If you lose all your lives, you are eliminated from the challenge. And you have to build with the wool representing your colors. And you get random items every minute.