Robots ...

5 parts of the Robot Arm
Waist
Shoulder
Elbow
Wrist
end effector (tool!)

Tools it uses
Spray Paint
Suction cup
welding bit
gripper
screw driver

Two types of Robot

Mobile - can move around
Three types of guidance for these
Magnetic - follows buried metal wires, if you want to change the layout you need to dig it all up
Laser -
Light - follows a painted white line by reflecting light - line could be affected by dirt etc!

Stationary - stay in the one place