About one day after receiving the butterfly eggs, the eggs started to hatch. Luckily, some of the eggs were still under a microscope and observed at the right time. Their hatching was captured on video. Within an hour, he caterpillar chewed its way out of the thin casing, ate the casing as food, and crawled off searching for more food. The caterpillar was blue in color with hairs sticking out of its body. This means just as soon as the eggs arrive in the mail, one has to be prepare hatching containers with food and distribute the eggs into individual observing containers in order for the students to observe the hatching in time. So, shipping time is critical toward the goal of the student being able to observe the hatching.