Okay kiddo, a manipulator is a device that helps people move things around. It's kind of like having a really strong and smart robot arm that can do things for you!
You know how you use your own arms to move things like toys or books? Well, think of a manipulator like a special arm that can move things that are too heavy or too hard for people to move on their own.
Some manipulators are big and are used in factories to move heavy objects like cars or furniture. Others are small and can be used in medical procedures to help doctors move tiny tools inside your body.
Overall, manipulators make it easier for people to do things that would otherwise be very difficult or impossible to do on their own.