Welcome to the forum and hopefully members here will provide the advice you need to keep the frogs healthy and growing.
My 1st suggestion would be to have a substrate based on either coco fiber. Eco Earth and Plantation Soil are two that work well with frogs.
Since your going to want to keep the humidity level around 50 to 60 percent during the day, the mentioned substrates will hold moisture and help here as would some live plants. even some cuttings of Pothos, Creeping Fig, and/or some ivy would help give places to feel secure while helping maintain humidity.
Flightless Fruit Flies are a great meal for these frogs and can be purchased at Petco for about 10 bucks a jar. The jar will produce flies for about three weeks.
Now I will suggest you check out Josh's Frogs - Largest online herps feeders and reptile supplies store for some info on fruit flies (has great videos) and how to produce your own.
Much less expensive if your keeping the frogs long term.
Flightless Fruit Flies, although they don't fly, will escape the tank even through most screen materials so having a secured up top will help reduce the flood of flies in your home.
Have a piece of plexi glass cut at a local Lowes or similar hardware store. I think I pay 6 bucks for a thin sheet and they cut it free.
To help keep the flies localized for feeding, you can set up a feeding station by placing a piece of banana in the tank and the flies will flock to it.
I usually put the banana in large bottle cap like the cap that would come with orange juice. Just crush the banana right in and you can leave it there to just melt away.
Another option is to feed Pinhead Crickets, which are newborn cricks. Your local pet stores should be able to order them in for you or you can buy them online too.
Besides that the only other thing I would provide is a water dish for them to soak in (no deeper than the frogs shoulders) and a stick or similar for them to climb onto.
Oh, make sure the water is declorinated tap water or bottled spring water and not distilled water.
They need the nutrients and minerals from the water.