The eclipse T-shirt sold by a local store didn't have my favorite design, but it was the one I found there:
I took that photo at the Museum of Osteology in Oklahoma City on our way back. I really recommend this bone museum.
By the way, very close to where we saw the eclipse is Lee's Legendary Marbles, a little quirky museum that bills itself as having the largest collection of marbles in the world (in addition to an antiques/junk shop.) Marbles and tops used to go hand in hand, so I asked if they had any tops. After a little haggling with the owner/collector, I got two pegtops with nice battle marks, a whip top, an early medium size Gibbs top with a very pointy tip and two pairs of Bandai Spin Fighters in their package from 1993. I was a happy camper.