Most people think of Post-it Notes simply as an office staple. While their biggest uses include note taking and organizing, the traditional 3-inch by 3-inch sticky squares can be used to make some nifty little crafts. Enter: the paper ninja star! While non-paper ninja stars, also called shuriken, were traditionally used as weapons in Japan, the Post-it Note version is a fun way to practice origami. Below, our step-by-step illustrated instructions will help you fold, crease, and attach Post-its into a transforming 8-pointed ninja star. Give this fun craft a try and use the finished product at your own risk!