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Certainly traditional since it was mentioned in “The House at Pooh Corner” by A. A. Milne and quite likely traditional before then.
A game beautiful in its simplicity. When you have a bridge over running water. Each person gets a stick and together drops them on the upstream side of the bridge into the running water. You then run to the other side of the bridge to see who’s stick appears first from under the bridge.
A nice game to play as a family when out and about or with friends.