Crystal Polydron CMY Set

48 translucent squares in cyan, magenta and yellow — build a cube, or a cuboid, or a whole wall of them, then turn it in your hands and watch the colours multiply.

Where the single cube is a lovely small thing, this set lets your child work out the system: which two colours make which third, what happens when all three overlap. They tend to discover it rather than be told.

Suitable from age 4.