Reset the Demo Unboxing Code for Beginner Kit

I would like to reset some of the grove beginner kits back to their initial code they come ready to run. The grove beginner kit comes with a nice code preinstalled so that when first plugged in one can check out the function of all the sensors and see them displayed on the tiny oled. Where can I find this code? I do not see it in the sketchbook in github for the beginner kit. I teach in an educational facility/ electronics checkout center so it would be great to be able to reset the kits for new students each semester.

As you said, we provide test codes for all modules of Grove Beginner Kit for Arduino. You can refer to the method shown in the screenshot below to find the location of the download code in the Wiki we provide(, and you can also choose to directly use this URL to code Download: