The beaver and the squirrels are playing their favorite game. Will you join in? Some of the trees by the lake have been gnawed by the beaver. If only the squirrels knew which ones! They jump playfully from treetop to treetop. Who will be the first to circle the lake with their squirrels? But watch out: from time to time, the beaver suddenly slaps the water with its tail, causing some of the gnawed trees to wobble.