1.6 inch (40mm) CMY Colour Cube with Velvet Gift Bag for Decorative Cube, Photography Prism, and Colour Educational Gifts, 2 Pack

ECBANLI CMY Colour Cube, CMYcube 1.6 inch (40mm) RGB Dispersion Crystal Optical Acrylic Prism for Physics Teaching Photography Desktop Decor, 2 Pack

BELLE VOUS Glass Prism, Cube, Crystal Ball & Pyramid Photography Accessories Set - Refractor Photography Props with Pouch, Cloth & Box - Physics/Photography Gifts

iKeelo Colour Cube (50mm) with Stand -Cyan, Magenta & Yellow Cube - Illustrates Subtractive Colour Model - Novelty Educational STEM Toy for Birthdays and Christmas