The Speak n' Spellbinder is "a Speak n' Spell and a Rock Band guitar all mashed into one."
All the buttons on the Speak & Spell are mapped to the Rock Band controller's frets, resulting in a "plastic speech axe complete with tone triggers, pitch control, whammy bar and more."
If you're unfamiliar with the art of circuit bending, a look at the 'Spellbinder's creator AJ Gannon in the video below will give you an idea of what it sounds like.
This particular mod is being used in Gannon's upcoming Toy Volcano album, which will, apparently, 'knock our faces off.'
A quick look through his other creations - The Space Cavern Synth and Demon Attack LFO, the circuit bent Casio SK5 and Fisher Price FPCMM and The Bee Gee's Super Destroy Machine (to name but a few) - make us inclined to believe it.