Growth mindset is pivitol to helping student success in any class, but in particular STEM classes (those involving science, technology, engineering and math).
These stickers are a fun way to encourage students to try a new idea instead of giving up and reinforce growth mindset thinking.
These printables are templated to print on DigiOrange multipurpose stickers, a pack of 1200 stickers is ~$13 and can be found here: https://amzn.to/2KdRFFt
That means for a very low cost you can hand out stickers to all of your students who stumbled, failed, and tried again! I use these in my science classes all the time to help students and it works great!