Any group size. All you need are some hula hoops.
Divide youth into a couple teams and have each team hold hands in a single file line. Start the hula hoops at the end of each line by having the first person put a foot and an arm inside. The idea is to get the hula hoop down the line of people without disconneting hands.
When the hula hoop reaches the end have the last student run with it back to the front and start again. We had teams of 6 and the team that cycled the original starter all the way through the line won. It only takes a couple of minutes. You’ll be surprised how fast they get going.