We’ve only had our caterpillars for a week but already they’ve doubled in size. Like the Very Hungry Caterpillar they spend all their time eating, and eating and eating! If we look at them with the magnifying glass, we can see there little feet and we can see their jaws constantly munching. They are also starting to spin some silvery threads so we don’t think it will be too long before they start to build their cocoons.