The Broad - taking children to art museums
treasure hunt/checklist for children to complete in order to get a small prize (think bookmarks) upon exit. It's fun and easy with things like, find something with wavy lines, find a piece of art with your favorite colors...etc.
I love THIS BOOK for getting a start on talking to kids about art! If you've never studied art (I took two college courses to meet my fine arts credit in my undergrad lol), it's a perfect way to get into art enough to discuss and explain enough of the possible questions kids will have about an art museum.