We visited all 6 parks in WDW and DL in one day! It was exhausting, but fun, and the kids held up remarkably well. What an adventure.
We had t-shirts made at DTD Design a Tee, which meant we had to come up with a "name" for our odyssey and choose a picture for the shirts. Since we made the trek on 6/26, we decided on "Experiment 6/26" above a picture of Stitch and "6 parks, 1 day" below Stitch. We got more comments on and questions about those shirts, and we look forward to wearing them with pride for many years to come.
Thanks again for all your support and suggestions, everyone!