Whirligig

noun

1. Anything that whirls or spins around, such as a toy top or a merry-go-round.
2. A device incorporating spinning, wind-driven propellers or pinwheels, used as whimsical outdoor decoration in a garden or on a porch.
3. A whirligig beetle.
4. A device for punishing prisoners, comprising a wooden cage that rapidly spins around.