The nearest part is the J.J. Hill Reference Library; I've read that both parts of the building were erected at the same time, but by different builders; must have been interesting.
I only visited the children's area on this trip. It's partly below-grade, but has lots of windows and natural light. Large collection. I like having bins labeled for alphabet books, opposites, colors, etc. I also liked the table covered with paper and with the invitation "Hey, everybody, add your art!"