The document discusses the development of an ergonomic children's flute with a Wave Line head joint. It was created to address issues with children starting flute too early on full-size instruments, which can lead to physical injuries. The Wave Line head joint allows the flute body to remain straight while shortening the instrument, maintaining proper embouchure and finger positioning from an early age. Evaluations found children could play comfortably and learn proper technique without physical tension or compromised sound quality. The ergonomic design aims to prevent future injuries from asymmetric posture often seen in flautists.