Make some noise for this wonderful way to help little learners with sensory development! Great for classroom supplies and learning games, these prisms each feature a musical note on one side and make a unique sound when shaken. For an extra challenge, the musical note can be hidden when turned upside down. With each sound, you’ll spark curiosity and improve their understanding of the world through sound! Wood. (1 dozen per set) 2" x 2 1/4"