Marbulous Marble Run Set of 121 Pcs Head Dissection Model Optical glass prism is an

Optical glass prism is an essential tool for photography

classroom and general purposes

large display with 3 1/2 digits (accuracy +1 digit)

Dimensions 270mm x 270mm x 112mm

The air bubble can be made more visually obvious using colored water

Marbulous Marble Run Set of 121 Pcs Head Dissection Model Optical glass prism is anIncluded: Marbulous Marble Run Set of 121 pcs with Pamphlet with sample mrble runs to build. Size of assembled game: 98x22x77cm Breathtaking drops, cool spinning wheels, & lots of twists and turns. Help teach children about other cultures in a fun and inventive way, while at the same time teaching them basic skills like hand eye coordination and spatial reasoning. Attractive and familiar elements that fit easily together. Perfect for Designing &