Yopay 5 Pack Crystal Prism Set, K9 Glass Optical Photography Prism Set, 50mm Lens Ball/50 mm Cube/50mm Triangular Prism/50mm Prism Pyramid/ 50mm Crystal Ball, Science, Teaching Light Spectrum
| Material Type | Crystal,Glass |
| Subject Character | Yopay |
| Theme | Rainbow |
| Size | Small, Medium |
| Operation Mode | Manual |
| Educational Objective | Color Recognition |
| Number of Players | 1 |
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