As stated below, you don't want to put a baby in too large of a cage. Although I don't think that humidity is much of an issue if you spray them every day (afterall, everyone keeps chameleons in screen cages), I personally don't like screen because it's hard to clean unless you take it outside and hose it down.
I too raise my babies in Critter Keepers. They are cheap and they have perfect ventilation. As the geckos get older, I move them into large tubs (58 quart Sterilite) for breeding.
If you want something more pleasing to the eye, Barrs cages (link below) are great for keeping Crested Geckos. They make a 16x16x20 cage, which would be a good size for a single animal or even a pair. They also make a 20x20x20 cage, which would be good for a trio or even 1.3 adults. I have about 25 Barrs cages and they're made very well and are easy to maintain.
Barrs Cages Website
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Anthony Caponetto
www.ACreptiles.com