Absolutely amazing photos! I like the last photo best, I think... he/she is in such a funny position (sleeping?), and the eyes look like they're wrapped in gold foil.
Are they part of your collection or from the wild? Guessing at least a few are captive, judging by the backgrounds - but seeing as you're from Costa Rica, I imagine wild frogs are easy to find.

I spent a week in Costa Rica some years ago, and was amazed at the rich wildlife... even in the city (San Jose) there were parrots and frogs everywhere! Such a wonderful place, and I can't wait to go back someday.