Okay kiddo, let's talk about something called "mechanical doping." Have you ever heard of bicycles that are used for racing? Well, sometimes people try to cheat by putting a special kind of motor inside their bicycles to make them go faster. That's called mechanical doping.
Now, these motors are not like the kinds of motors you see in cars or airplanes. They are very small and hidden inside the bike frame or the wheels, so no one can see them. When the rider pedals the bike, the motor turns on and helps the bike go faster without the rider having to work as hard.
But, that's not fair, is it? Because some people are working really hard to pedal their bikes as fast as they can, while others are cheating by using a hidden motor. That's why mechanical doping is not allowed in bike races. It's important for everyone to play fair and use their own strength to win.
So, officials use special scanners to check the bikes and make sure there are no hidden motors inside. If they find one, the rider can get in big trouble and lose their chance to compete in the race.
Remember, it's always better to do things the right way and play fair. Cheating might seem like an easy way to win, but it's not the right thing to do. Everyone should have a fair chance to succeed!