Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Recreational Artifacts (hierarchy name)
5. recreational artifacts (equipment)
6. toys (recreational artifacts)
7. [toys by form]
8. optical toys

Anotations

Scope note:

Optical toys consisting of disks with different images on each side which, when the disks are spun rapidly, tend to merge together as the strings on which the disks are mounted are pulled by the fingers; developed in the 1820s.