Thats great pretty cool hunh? Well there all different menthods (that are simular) First is a bought incubator a Hovabator, but it kinda sounds as if you don't have one of them. So here is a few paragraphes I will paste from Will Wells site explaining his method, you can also use deli cups filled with perlite, instead of vermiculite, your choice. And put cups inside the bigger box. ******** heres the info from his site:
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The eggs must be removed from the cage. Keep them right side up and place them in an incubator. An incubator can be made from a plastic shoe box with a hole, the size of a quarter, cut in the top for air circulation. Fill the shoe box with about three inches of vermiculite and keep the vermiculite moist but not wet. Put the shoe box in a place were the temperature won't drop below the high 70's at night and won't rise above 90 degrees during the warmest part of the day.. Temperature fluctuations will insure that the hatchlings will be of both sexes. As long as the eggs continue to grow they should be fine, even if they turn an off white to brown. In about 40 to 60 days the eggs should be ready to hatch. It take several hours to more than a day for the hatchling to break free from their eggs. Their umbilical cords will remain attached for several days. Hatchling lizards need natural sunlight in order to develop properly. Without it, they will likely perish. They can be fed week old crickets, but they will eat anything they can get their mouths around. Collared lizards grow very fast and within a matter of weeks they can be fed adult crickets.
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Hope it helps, Eve