The durable plastic is easy to handle and allows for quick and simple sanitization. The nylon cord joining the two plastic shells stays tight and will hold up in the classroom. A fun instrument to use, the BBC01 Castanet can be doubled up for multiple notes in quick succession. The BBC01 comes in 4 bright colors: blue, green, yellow, and purple. Experience the simplicity and ease of use today. Size: 2.5”  Colors may vary.  Ages:  18 months+.  Sold Individually. Please note: This musical instrument is not a toy. It is intended for use with adult supervision and is not for children under 18 months of age.