Explain how quantum tunneling works, but in the style of cavemen speak.
So, imagine you living in cave and you see big rock in front of you. You want to go through rock, but it too thick and solid. You try push rock, but it not move. You try hit rock with stick, but it still not move. Rock too strong!

But, you hear from wise cave person that there way to go through rock without moving it. You need special power called quantum tunneling. You not sure what this mean, but it sound powerful!

You ask wise cave person to explain. They say quantum tunneling like magic power. It happen when tiny thing, like electron, try to go through big thing, like wall. Normally, it can't pass through wall 'cause wall too thick and electron too small. But, with quantum tunneling, electron can magically teleport through wall! It like electron dig hole through wall, but hole too small to see.

You confused. How can electron go through wall without making hole? Wise cave person say it happen 'cause electron no act like normal thing. It act like wave sometimes, and when it act like wave, it can tunnel through wall. It like wave go over rock in river. Sometimes, it can go through rock too! It weird and hard to understand, but that how quantum tunneling work.

You still confused, but you excited. If electron can go through wall, maybe you can too! You try to tunnel through rock with your mind, but it not work. You need more practice.