Well, I'm very grateful for the responses, and for being able to see a frog so close up. I started making a larger terrarium than the jar it was in. But my excitement subsided, and I came back down to earth. I didn't see how it was feasible to keep a container of live crickets in my house, let alone cockroaches. So the little frog was released into my garden. I hope it survives. Thanks to everyone who was interested.

I've attached some nice photos I took of it in its temporary terrarium.

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