Abstract: A lot of musical toys (e.g., toy guitars, toy drums and percussion) can provide a good introduction to musical instruments and give children high entertainment. Via playing an instrument toy, children can sense and practice what kinds of physical movements (e.g., fingers and/or mouths) they need to play its corresponding actual instrument to produce sounds. In this paper, we present an electronic trombone with three different playing modes for children. The research mission is to offer a simple and joyful approach to engaging children in learning to play a trombone.