Hey Froggy,
I have a brand new 5 gallon that I bought as a home for our betta. After I put the gravel and plants in, he really loves it. Today I added two danios to cycle the tank. I hope they are hardy enough. I am also hoping to add a frog after the tank has cycled so I'll be interested to hear how it goes with your 3 gallon.
Good luck,
Mari