Make sure you are in town when they are supposed to become butterflies! We have ordered caterpillars 2 times before and had wonderful experiences. I recommend doing this with your family. I just warn to pay attention to the time frames from when they close up to when they are ready to get out. We were out of town for two days and I thought we had plenty of time left so I didn't hang the lid inside the net cage. The butterflies all emerged in the little cup and only 2 survived. I know that sounds like a duh... but I made a mistake and it was very sad so I hope my mistake will help someone else.