Parallel key

Alright, kiddo. Have you ever tried to unlock a door with a key? Well, a parallel key is a special kind of key that helps lock something in place or keep two things connected together. Imagine you have two straight lines that you want to join together. The parallel key fits inside both lines and helps keep them from sliding apart. It's like a little helper that keeps things in place. Just like how your shoes have shoelaces to tie them together so they don't fall off your feet while you're walking, the parallel key keeps things connected and sturdy. Cool, huh?