There are several smaller frogs that actually eat crickets, like Green Tree Frogs (you'll see that abbreviated GTF, btw), I don't currently have any of them, but I do have a very similar frog called a squirrel tree frog. I don't think you can get mine in a pet store though, I caught mine back home in SC. I think it is generally just the Poison Dart Frogs (PDF is the abbreviation we use) eat fruitflies, but I could be wrong! Would you like me to look up some species for you for suggestions? I am thinking of getting some Red Eye Tree Frogs (RETF... I'm sure you are seeing a pattern here, lol...) I think they are very beautiful, but I'm not sure what they eat. Waterkeeper has some though, so you could enquire there. Good luck! Take time setting everything up and getting it just how you want it before you get your animals, it is sooooo much easier that way.
