But in some situations–for example ... wanted some breadboard setups for students. I did end up make a simple PCB that plugs into a breadboard, but looking back the simple circuit would have ...

However, you can also pick from a number of predefined circuits ranging from the simple (a voltage divider, for example) to the illustrative (a PLL frequency doubler comes to mind). There’s even ...

You can see an excellent example of breadboard-as-art on the cover of “Analog Circuit Design ... with an LED bar-graph IC that shows students the difference between a linear and a non-linear response.