In a big room called the control room, there are really big screens. These screens help people see all the airplanes flying in the sky, kind of like a big game where everyone is flying around!
The people in the control room talk to the pilots of these airplanes using special radios. They help the pilots know when it is okay to leave the ground and when it is time to land. They also tell them where to fly in the sky so all the airplanes can stay safe and not bump into each other. It's like being a helper in the sky, making sure everyone knows where to go!