A bionic arm is not a real arm. It is mechanical. It works almost as well as a real arm. It changes a person´s life. A person does not need so much help from other people if he has this arm. He can play games or ride a bike. He can tie his shoes.

Campbel Arid gets his bionic arm in 1998. He is the first person in the world who gets it. His arm weighs 1.8 kilograms. It uses a battery.

Now the technology is changing very quickly. Today´s bionic arm reads signals from a person´s muscles. Scientists believe that the technology will change soon. New technology will read a person´s mind.