Beatblinds, designed by William Gurley combine regular wooden window blinds with a xylophone in what could be the most annoying window covering ever devised! Yeah it would be great for a kid’s room as long as your room is way at the other end of the house. Is there any instrument more annoying than a xylophone (ok, maybe the pan flute)? There’s only so many times you can play the NBC chimes before it gets old. Still, it’s an interesting concept for kids or your percussionist buddies.