Quite possibly, this is the cruelest thing that you could do to someone. Particularly when you don't understand it or only know part of the truth (at best), anyway. Let people live; let people learn. (Those are not my words but well said.
Of course you can add braille to almost any toy. All you need is a good braille labeler and a little space on the toy and you're good to go! But it's also exciting to find toys specifically designed for blind or visually impaired kids who are learning (or
Bubble Wrap Run: Simple Indoor Fun! I used several separate pieces of bubble wrap with duct tape. (side note - duct tape doesn't leave any residue on pergo :)(Make sure to tape down all sides!) The bigger bubble wrap works better than the smaller.