TickiT Rainbow Glitter ShapesSparkling colour glitter shapes in 7 colours. Each colour includes 3 versions of a polygon: irregular and regular, ideal for understanding simple geometry principles. The shapes are made from 3mm acrylic and can be used on a light panel and each one comes with a 2. 5mm hole at the top balance point so they can be strung up against a window or outdoors to create fascinating colour shape shadows.