whirligig
1. [ noun ] a conical child's plaything tapering to a steel point on which it can be made to spin
Synonyms: teetotum spinning_top top
Examples:

"he got a bright red top and string for his birthday"

Related terms: plaything peg_top whipping_top humming_top
2. [ verb ] whirl or spin like a whirligig
Related terms: spin top
3. [ noun ] large mechanical apparatus with seats for children to ride on
Synonyms: merry-go-round roundabout carrousel carousel
Related terms: ride