Isis, when you think about size and the reasons why everyone is telling you to get a small plastic tub from the store for her (15 qt size) and very small hides is this....

In nature almost no newly born or hatched animal lives in it's full environment. They are kept to small, hidden places for their own safety. Instinct, or in the case of maternally raised animals, tells them that being exposed is dangerous. They can become prey before they ever get the chance to be a predator or live any of their lives. Even within a herd on an open plain, young grazing animals are at the side of their mother or kept to the inside of the herd. Natural instinct is making your very young snake overly stressed in large open glass environment like that.

Add to this the fact that ball pythons tend to be secretive, naturally shy snakes. They live naturally in rodent burrows or inside termite mounds. They stay in tight, low light places and ambush their prey. They are not active hunters that chase prey. They tuck up and they wait, safe in their hidden places.

In captivity we need to replicate that especially for these little ones or they simply will not eat well and thrive.

Get a small tub, 15 qt, no more than 6 inches tall. Put in two very small hides made from just about anything small and dark. Small dark colored plastic bowls work great. If you can fit two in the 15 qt that's fine, if not, put one over the warm end, with her drinking bowl on the cool end.

Buy black binder clips to keep the lid secure. You want at least 4 of them, better yet 6 since these snakes can get out of any give in a lid. You want a small, non-tip water dish. Your snake does not need to soak in it, just to drink from. None of this should cost you more than $20.00.

Here's some pictures for examples....

This is a 15 qt Iris brand tub with binder clips used to make the lid secure.....


Same tub with the lid off.....


Close up of the hides we use for the little ones...just a 3 for #1.00 smaller than cereal bowl size from the dollar store with an entrance hole melted in the top using a simple soldering wand (same thing I use to put the ventilation holes in the tubs - $6.00 at Walmart)


Even as they grow they seem to like confined spaces best. This is a bit bigger female BP in her 32 qt enclosure.....


To use the "newspaper trick" to settle a snake, here's a series of pictures to explain it....

tub without newspaper....


tub with newspaper.....


side view of tub with newspaper (see how it differs from yours)....


I would set her up in a 15 qt, add in the newspaper bunches, fresh water in her dish then leave her be for a solid week without anything other than very quiet, very brief peeks for removing any waste products.

In the meantime call around to pet stores and ask them what day of the week they get in their mice. Phone back that day and ask if they have any VERY small adults (most stores call them adults when they are basically just weaned mice anyways). Go get one, bring it home in a ventilated kritter keeper and let it sit on top of the warm side of her enclosure for a few hours (making sure the mouse cannot escape.....cardboard boxes from the pet store do NOT work).

After a few hours, open your snake's tub quietly, move only just enough newspaper to introduce the little mouse into the further area of the enclosure away from where your snake is, then snap the lid back on and sit nearby quietly. Don't hang over the snake's tub, don't have loud bass music on or a lot of foot traffic nearby. Try to pick a time in the evening as these snakes are nocturnal and some prefer to eat mostly at night. If the snake doesn't eat, remove the mouse, put it in an enclosure so you can feed and water it and keep it for another 5 days to try again.