Place a black and white board on the top and spin it to observe fascinating optical effects which vary with speed. Children will develop motor and visual perception skills and will love the exciting different effects. Good for partially sighted children. Dia. 23cm, 1.5cm thick. 5 interchangeable lacquered black and white discs. Age 3+.
| Manufacturer reference | 103 594 |
| ASIN | B0764GN8BN |
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