Turnstile (symbol)

Have you ever been to an amusement park or a stadium and seen a machine that you have to go through to get inside? That machine is called a turnstile. It's a metal gate that spins around and around, like a big wheel, and only lets one person through at a time.

Now, sometimes people use the word "turnstile" to talk about something else, too. They mean a symbol that looks a little bit like a turnstile: it's two lines that cross in the middle, and the lines have arrows on the end. This symbol is often used in math and logic to show that something is true.

So, imagine you have a puzzle with a bunch of doors and locks. You can only unlock certain doors if you have the right key, and some doors lead to more keys, and some doors lead to dead ends. With the turnstile symbol, you can show which doors lead to more keys! It's like you're spinning the turnstile to get through to the next level of the puzzle.

Overall, "turnstile" can mean two things: a machine you might see at a stadium or an amusement park, or a symbol used in math and logic to show that something is true. Either way, turnstiles help you get where you need to go!