I just learned from Thomas Marshall Does It All that there is a new (as of 2011) program providing free twin-vision books to blind and visually impaired children. The APH has partnered with Dolly Parton’s Imagination Library to
[expand] Dolly Parton’s Imagination Library (DPIL) program to provide young blind and visually impaired children with accessible books in audio and print/braille formats!
Children are eligible to participate in the program until their 6th birthday, and participating children get five free twin-vision books a year! I just applied for the program for Peanut, and they do require you to certify that your child is legally blind; I’m assuming this is how they’re monitoring the eligibility requirement that participating children be likely to be braille readers as adults.
If your kiddo is 5 years old or younger and is a future braille reader, check out the program (and apply!) at http://www.aph.org/dolly-partons-imagination-library/apply.html.