S.T.
Kids never seem to like meat at this age - it's all about the texture. Meat is tough to chew. I think that's why kids LOVE hotdogs & baloney - it's all smooth. You can find both products without all of the nitrites & additives - at stores like Trader Joes, etc. You can trade off meat substitues like legumes & tofu so he's not always eating hotdogs & baloney. Just remember to cut into little bitty pieces so it's not a choking hazard.
As for the coins - think like a toddler - there's this cool shiny thing and it's hard to pick up, it's smooth and isn't like any of my toys. It kind of reminds me of my cheerios and sliced grapes. And every time I finally get my hands on it my mom takes it away from me. While some little ones don't put every thing in their mouth MOST do. It's part of the sensory process - they're still learning to use their hands and fingers - but they've been using thier mouth since the day they came out of the womb.
(My son, once he was done with diapers & began to wear underwear seemed to try out everything on his winky. He's pick something up, look at it, then shove it down his pants! If that's not indicative of a typical male I don't know what is!!! )