how insects grow?

It's pretty crazy - they have to shed their exoskeleton every time they want to get bigger! Instead of having bones on the inside like us, insects have bones on the outside like a suit of armor. This exoskeleton doesn't stretch or grow, so when insects are ready to get bigger, they make a new one underneath, and the old one splits apart along the back of their head, and they pull out a brand new body out that's bigger and more developed!