The Mystery of Winna-Bango Falls - S1.E9

When Jane Kangaroo insists that the citizens of Lake Winna-Bango cease sliding around on Fruzzle-Floom Fruit peels and instead discard them, the mighty waterfall mysteriously stops falling. It's up to our hero, Thidwick the Big-Hearted Moose, to piece together the ecological chain and restore the water source.