Praying mantis eggs hatching

This is Colton's praying mantis egg sac that we thought would never hatch. We had a spell of warm days so I moved the jar outside and set it in an empty flower pot that had soil in it hoping it would hold the heat a little and work. Well, it did! I checked on it one day and sure enough, they were beginning to come out by the ton. We probably had over 100 babies total. This was a neat experiment because we saved the sac for a few days and they continued to hatch out of it. We got a little habitat and had to go to the pet shop for baby crickets-live ones to feed them. The crickets were actually eating the mantises because they were bigger. Soooooo, we had to be careful to feed them ones that were smaller than the mantises.