Okay, you might think, these plastic boards are boards, but where is the bread?
Read on in the next step to lift that secret.
Step 1: History
Wikipedia: In the early days of radio, amateurs would nail bare copper wires or terminal strips to a wooden board (often literally a cutting board for bread) and solder electronic components to them. Sometimes a paper schematic diagram was first glued to the board as a guide to placing terminals, then components and wires were installed over their symbols on the schematic. Using thumbtacks or small nails as mounting posts was also common.
You might think this neanderthal technique is obsolete, but there are still a few reasons to use it for example in educational contexts. But first let me show you how to build a circuit on a real bread cutting board.