I setup a hands-on Pi-Top station in our coding playground and wanted students and parents to be able to experience an introduction to physical computing with the Raspberry Pi, so I created self-guided "Physical Computing with Scratch" task cards and set up the breadboards ahead of time. Families had so much fun programming LEDs, buttons and PiCameras in Scratch that the last attendees didn't leave until almost an hour after the event!
Below is a link to the cards I created, including the Python version. Enjoy! And check back later, as I I plan to update the task cards in the coming months with a couple more activities.