She’s fitted a piezo sensor on the bottom of each xylophone key, interfacing it with an Arduino. When a mallet hits a key the corresponding box augments the sound in one of several ways.

Want to play the xylophone but don’t want to learn how? [Rachad]’s automatic xylophone might be just the ticket. It uses homemade solenoids to play tunes under computer control. Think of it as ...

and Twilight. However, the sky’s the limit with these building blocks. The proof is in this fully functional xylophone made entirely from the toy bricks. Andrew Huang is the musician and ...