An incubator provides the optimum environment for the eggs to hatch, and is the best option for a successful brood of hatchlings. However, you can improvise with a plastic box (such as an ice cream tube or wet wipe box) containing moistened vermiculite and kept at the appropriate temperature. Around two inches of moist (not wet) vermiculite is about right, making small indentations with a thumb, and place an egg in each indentation. Monitor regularly for signs of the eggs being too moist or dry.