Well the easy way is Dale has a red nose and Chip has a black nose but since you are blind that will not help much. I am assuming that you can kind of "see" faces with your hands so in your case the front teeth will tell you which is which. Dale will have 2 front teeth about 8" apart and Chip will have one in the center.How do you tell Chip and Dale apart? I'm blind, so honestly, I have no idea. I'd rather greet them as they are, instead of asking "so, are you Chip or Dale" and having to feel their faces to see if I get a yes or no.