Sure! Imagine each popcorn kernel as a tiny little house with water inside. When you put them in the microwave, the water inside gets hot and turns into steam. Now, just like when you blow up a balloon, the steam needs somewhere to go. But the kernel has a hard shell, like the walls of a house, so it can't escape.
As the steam builds up pressure inside the kernel, it tries to find a way out. Suddenly, pop! The pressure gets so strong that it bursts through the shell, making a little explosion. That's when you see the kernel turn inside out and become fluffy popcorn!
So, every time you see a kernel pop, it's like a tiny surprise party inside your microwave!