Something I always tell my students when going over safety protocol with equipment is "Equipment is expensive, but its replaceable. You and your fingers aren't!" I usually have to split up my lab exercises into multiple small groups (due to COVID and minimal avialable equipment), so I always have a worksheet or topic relavant exercise due at the end of class for the other students to work on while the others work with the equipment. It keeps them on topic and gives me an opportunity to see if they can apply the concepts in practice and theory.
