DIY Design: Our DIY pan flutes allow children to create their own musical instruments, encouraging creativity and enhancing hands-on skills, cognitive development, observation, memory, and coordination. Suitable for Students: This DIY flute is ideal for elementary school students and kindergarten-aged children, offering a fun and educational activity. Science Experiment: The homemade flute introduces children to a traditional musical instrument, helping them explore basic principles of physics and acoustics. Easy to Assemble: Hollow out the tube and set the plug aside for later use; use two tube racks to secure the straws and arrange them in varying lengths; plug the bottom of the straws with the provided stoppers. Musical Learning: With DIY pan flutes, children can explore the fascinating world of sound, learning how it is produced and altered. Size Chart: Inner diameter: 11.8mm, Outer diameter: 13mm Violet lengths: 135mm, 150mm, 170mm, 190mm Blue lengths: 125mm, 145mm, 160mm, 180mm Package Includes: 1 set DIY pan pipe instrument Note: 1. This is not a toy for infants. Keep out of reach of young children to prevent ingestion. 2. Slight variations may occur due to manual measurement and differences in display monitors.