More than just a Bluetooth box, the BoseBuild Speaker Cube ($149) is a chance to get your child interesting in electronics. The kit includes everything you need to build the speaker, with rugged components designed with kids in mind and app-based instructions.
Along the way, your child will learn about concepts ranging from magnets and electromagnets to how sound works, and when finished will end up with a high-quality speaker they can take pride in having built themselves.