25 polished crystal clear acrylic blocks with smooth, tactile surfaces. The set contains 17 different shapes designed to encourage children to create patterns, sequences and imaginative pictures. The regular shapes can help develop mathematical language and the understanding of geometric forms. The irregular shapes will allow for more creative and complex pictures whilst encouraging the use of descriptive language. Early science concepts can also be explored, such as observing the fascinating way light behaves when passing through the shapes, demonstrating refraction, shadows, internal reflection and distortion. • Understanding the World - observation • Physical Development - motor skills • Maths - shape & space • Personal Development - collaborative play • Communication & Language - descriptive language.