Plato's Cubes cubes come with 7 colours representing the visible spectrum. With 5 cubes for each colour, they're perfect for science experiments dealing with colour theory and light. These beautiful translucent cubes come with 35 colourful blocks to play with. Each cube is 2.5cm (1") in size & They're made from non-toxic acrylic. Each cube is carefully handcrafted with beveled edges and are safe for children ages 3+. They can be used to create all sorts of different effects in your creations, and the translucent material means that light can shine through them in interesting ways. With so many possibilities, the only limit is your imagination!