The next day, we went to the Space and Rocket Center. A bit pricey, but worth it, especially since we qualified for membership. Not sure if it's only good until the end of the year, or for an entire year.
There was a Geo-caching activity. We just finished a unit on maps and globes, so this was perfect! (He got all the questions right, too!) I tried to take his picture several times here, but he had a weird face, so finally, he just did this: