Dsloan
·Ha! These are currently my son's favorite books: the knowledge Encyclopedia Dinosaur! And Savage's Mammal Evolution: an illustrated guide (with your favorite Megatherium pictured!)
My son is much, much more interested in Smilodon then Megatherium right now, but he's less, much less interested in the Cenozoic than he is the Mesozoic.
You should check out Andrewsarchus and Thylacosmilus! They give Megatherium a run for its money when it comes to extinct megafauna.
Oh my, the thread drift we could have. I loved paleontology as a kid, and now I'm deep in it again with my 5-year-old. We've been volunteering at a dino dig site and he's got a big collection of books on extinct mammals. But he's really partial to the big birds in that time period like Titanis.
I'm thinking of starting to collect fossils, with him, but haven't pulled the trigger on anything fancy yet.
Sorry for the thread drift. I think my real response for the OP would be a Sinn EZM mission timer. They have lots of options and I think the are very handsome tool watches, some with tegimented or other coatings that keep them looking sharp if you're doing work that is likely to scratch a normal watch.
Edit: d'oh, OP wants an Omega. I think a Planet Ocean or an X-33 would would be great for this situation.