do they sell fossils or rocks in the gift shop

There are some rocks in the gift shop and some toys where you can excavate "fossils".

I cant say yes or no, I didn't go into the gift shop. But you could always call and ask. I would steer toward yes on a fossil replica due to the dino exhibit on the 1st floor.

I didn't see any fossils or Rocks. They do sell rocks at the St. Louis zoo though.

Sorry. Did not visit the gift shop on my visit.