A game to promote co-operation, with no equipment needed.
Explain that every player has 9 points on their body which can contact the floor : 2 feet, 2 knees, 2 elbows, 2 hands and 1 forhead.
YP play on their own to begin with - a leader will call a number between 1 and 9, and all the YP must place that many poits of contact on the floor (no more and no less), and hold it for at least 5 seconds. No equipment can be used, ad the YP must not lean on furniture or walls.
You then pair them up - and now call a number between 2 and 18. Once they have mastered pairs - you can get them ito groups of 4, and the valid numbers here are from 4 to 36.
One they are in groups, they can lean on each other for balance.
You could give extra points for inventive shapes. For older sections put them in larger goups (6 or more) - and have them complete the task in silence.
Watch out for unstable shapes - and ecourage them to think about safety of their team.