They would tie dozens of elastic bands together to form a large loop and then they were ready.
2 girls stood opposite each other with the elastic loop around their ankles and a 3rd girl would jump in & out of them, as they did with skipping. There were different moves & different degrees of difficulty - twisting them, hopping in between etc.
After the first ankle level was complete, the elastics would be moved up to knee height, then the waist.
Can't recall now if there were rhymes that went with it too.
Anyway, here below is film of Dundee lassies showing how it's done...although demonstrating that you could also tie the elastics around a lamp-post to play the game.
