Heather, you have more experience than me in this area. I never kept the two together at home, nor had we, at the wholesaler, put the two together. You know your stuff!
Personally, I would ditch the goldfish and/or frog idea altogether and keep a tank of fancy guppies. That was always fun for me when I was a kid and it was about the only thing my daughter found to be entertaining enough, as a baby/toddler, to keep her from crying.
Shelly/Unknownclown, you may want to consider any of what I had when I was a kid: I had 8 tanks in our basement. one had livebearers, just having at it. Another had Water Sprite. Another was for a breeding pair of Convict Cichlids. Anothetr for a breeding pair of Jewel Cichlids. The rest were devoted to breeding Bettas, Paradise Fish, Pearl Leeries, Dwarf, Blue, and Thicklipped Gouramis. Kids like to see baby fish.
Heather/Moonflower, have you ever had Ramshorn or Albino snails?
(I don't know what to call you two!) * [img]http://www.**********.com/iB_html/non-cgi/emoticons/new/confused.gif[/img]