Im really happy for your new (soon to be) babies! Good luck with them.
One thing i will mention because it seems no one else noticed it is you really should get them off calci-sand immediately. Although it claims to be safe, digestible and beneficial it is not. It clumps together in your leo's tummys and causes sharp jagged masses that can cause internal damage and impactions. I dont even know how many people i know of that have lost leos to this misleading substrate. If you want to have them on sand washed, screen, fine particle play sand is the best way to go (2$ for a 50lb bag at home depot). But even this can cause impaction, you can also use paper towels, newspaper, tile, linolium, non-adhesive shelf liner, or indoor/outdoor carpeting. Hatchlings should definately be housed on one of those safer substrates until they are 1yr of age, by then they will be better hunters and wont be getting huge mouthfuls of sand and their digestive system will be more apt to be able to handle the occasional sand that they do injest.
I cannot stress enough how dangerous calci-sand is. For your lizards calcium needs you can dust their insects and leave a dish of calcium powder in their cage for them to lick.
Here is a link to a thread of a recent case of impaction caused by calci-sand...luckily the owner caught it in time and it looks as if the leo will be ok.....
http://forums.kingsnake.com/view.php?id=807899,807899
Good luck with the babies!
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0.1 Bearded dragon
0.1 mexican Black kingsnake
1.1 Leopard Gecko's
0.0.1 Tokay Gecko
1.0 Blue Tongue Skink
0.0.1 Reverse Okeetee Corn
0.1 Anerythristic Corn
0.0.1 Red Tegu
0.1 Bullmastiff
4.1 Cats