QR codes! You learned how to make them and use them! The sticker itself is a QR code too! Adafruit offers a fun and exciting stickers to celebrate achievement for electronics, science and engineering. We believe everyone should be able to be rewarded for learning a useful skill, a badge is just one of the many ways to show and share.This is the "QR code" sticker that goes to the Adafruit site. It's for use with educators, classrooms, workshops, Maker Faires,