The indoor kid areas I'm aware of are in the RF corner of the field level and home plate-ish area of the terrace. (Our childless household refers to the terrace play area as a kid Habitrail.) I have to admit I don't know how good a match the available activities are for someone who's blind. I believe the field level play area still has the huge glove in which people sit for photos. That would be hands-on for sure. The big fiberglass Bernie statue (situated on a bench for photo ops) was moved to the center of the loge level, kind of behind the press box, for this season. That's sort of hands-on. There used to be fiberglass sausage statues near the RF corner of the field level; with the remodeling done last off-season, I don't know if that's still the case. The mascots (humans in costumes) are in the concourses at particular times and they are always posing for photos with fans. When you arrive, you might ask at Guest Relations for further suggestions. There are booths on the field, loge and terrace levels, and the staff there have a wealth of information, some of it game-specific (for example, on a low attendance day, they know which concession stands are open vs closed). Honestly, it's probably worth contacting the Brewers in advance. Their Miller Park A to Z guide encourages fans to "let us know how we can help you enjoy your game experience. Please call Guest Relations at (414) 902-4900." So take them up on that! Congratulations on the adoption, in any case!