You’ll need a flexible clear plastic tube at least a metre long, some liquidy Jell-O and a ground covering. Put the Jell-O inside the tube and have two youth stand at each end of the tube. The idea is for each to blow into the tube as hard as they can for as long as they can. The person who gives up or has weaker lungs will inevitably get Jell-O on their face. An excellent, high excitement game. You could even have playoffs and award chocolates or lollies for winners.