Sound Prism Set Sound Prism Set Sound Prism Set (4 ratings) £21.00 Apologies - Out of Stock Sound Prism Set The set contains 6 pairs of beautiful hardwood triangular prisms, identifiable by colour coded musical notes. The musical note logo only appears on one end of the block so they can be turned upside-down to test the user’s discriminatory skills. Supports the following areas of learning: • Understanding the World - sound • Personal Development - sensory Size of prism: 50mm x 60mm. Pk6. Age: Suitable from 18 months.