Okay kiddo, type punning is when you take a value with one type, let's call it "A," and use it as if it had a different type, let's call it "B."
Let's say you have a toy car, and it's labeled as a "Hot Wheels" car. But you want to play with it as if it's a "Matchbox" car. That's like type punning!
Computers do this too. Let's say there's a number that's an integer - that means it's a whole number, like 7 or 21. But you want to treat it like it's a decimal number, like 3.14. You can change the type of the number to be a decimal type, even though it wasn't originally that type.
But be careful, kiddo! Sometimes when you change the type of something, it can cause problems. It's like trying to fit a puzzle piece into the wrong spot - it doesn't fit and ruins the whole picture. So, you should only type pun if you know what you're doing and it won't cause any problems.