Fast motion is when things go very quickly. Imagine you are playing with your toy car and you push it really hard, it will start zooming across the room very fast. This is what we call fast motion.
Sometimes things can move so fast that our eyes cannot keep up with them. Have you ever seen a superhero in a movie move so quickly that you couldn't see their movements? That's because they were moving in fast motion.
Fast motion can happen in many different ways. Cars can drive very fast, planes can fly very fast in the sky, and runners can run very fast. Even roller coasters can move very fast, which can make your tummy feel funny!
But it's important to always be safe when things are moving fast. You should always wear a seatbelt in a car, and make sure you're on a safe ride at the amusement park. By being careful, we can enjoy fast motion and have lots of fun!