Bob Knetzger of Boing Boing reports that, last year, Mattel teamed up with the National Federation of the Blind to produce a Hot Wheels toy car designed specifically for the visually impaired. The die cast car is covered with the raised bumps of Braille text to read "Hot Wheels Twin Mill."
This name is a reference to a concept car that was pioneered as a Hot Wheels design in 1969 before it was turned into a real car.
Mattel makes two of the Hot Wheels Braille Racer, both of which can be hunted on eBay by collectors eager for a rare piece.