- We’re going to build some circuits with the bird. The bird works by inserting a bellow into its body. When the bellow inflates, the wings move down. When the bellow deflates, the wings move up again.
- Build the breadboard setup. Use one of the thin, longer tubes (3×1.5mm) to insert into the male tubes.
- Turn on the pump and control the bird by moving the variable resistor slider up and down.


- Now we’re going to add a button. But we’ll still need the variable resistor to release the air from the bellow.


- Now let’s use the oscillating valve to control the bird. With the valve, you don’t have to press a button every time you want the bird to flap its wings.


- Finally, we’re going to make it a bit more difficult. Now we’re placing the bellow after the valve, and again we need a variable resistor to let the air escape.

