Steppers are an interesting music controller designed for 5-year olds:
As a group, we hoped to make a toy that not only encouraged physical activity, but that also acted a clear and direct musical interface.
Steppers transform walking, dancing, running, and jumping into a unique and dynamic activity, allowing the user to express themselves audibly through their [...]

Why is it that, despite a well-executed PR campaign, so many videos of the Tenori-On are so boring?
Here are five Tenori-On videos that are not just visually boring, but they suggest that the Tenori-On encourages a certain sameness of sound:
I Am Robot And Proud @ Cruising Iris

Making MIDI Music with the Yamaha TENORI-ON

John Herndon from [...]

This is the most bizarre music synthesizer we’ve seen in a while.
Every synth should come with a skeleton sequencer!
via the Experimental Electronics-Blog

Tuttle Soundlabs has a great collection of quirky theremins at their site, including a theremin cigar box and even an curiously strong Altoids theremin!
via Handmadenoize

Check this out: The Sound of Touch is an instrument for real-time capture and physical stimulation of digital sound samples, using a specially constructed wand and any physical material.
The hand-held wand can be used to (1) record sound, then (2) brush, scrape, strike or otherwise physically manipulate this sound against physical objects.
These actions produce sound [...]

You may remember Peter Bennett and his steampunk music sequencer. Here’s a series of videos from Bennett feature other interesting new interfaces for music.
The Virtual Drum

A haptic force feedback device that simulates the feel of a drum, designed as part of Bennett’s MEng in Cybernetics at the University of Reading. The switch held in the [...]

Björk has been wowing audiences recently with her reacTable, a new music controller that uses movable blocks and a colorful video interface.
The reacTable’s developers say it is the latest in an emerging wave of “tangible music interfaces,” but to the touring musicians who play the thing, it’s merely “cool.”
“Established instruments like the Moog, the turntable [...]

Scientists at Keio University in Japan are pioneering new types of clothing, inspired by analog synthesis, that can change color to match various outfits. The hi-tech clothing is an example of current research into wearable computers.
A color-shifting “chameleon shawl”, developed by Akira Wakita, incorporates red, blue and green light-emitting dioedes(LEDs). By varying the brightness of [...]