In this chapter, to wire and attach sensors to the robot, we are introducing two other robot parts. The following photo shows a bunch of jumper wires and a breadboard:
In the previous photo, there are jumper wires (1) and a breadboard (2). Jumper wires allow you to jump connections from one part to another, making connections between them. The breadboard lets you push wires and components into it, and also to make connections between them. The green lines illustrate the connections that are under the squares/holes you can see.