This is a super cool way to help students visually see their pulse beat. All you need is a toothpick and marshmallow or clay. First students stick the toothpick in the small ball of clay or marshmallow and then they find their pulse on their wrist. After finding their pulse the students place the toothpick apparatus on their wrist and the toothpick will start moving back and forth matching with their pulse beats.
This is not only a different activity then just having students take their pulse normally but it can also help them visually see the idea of blood pumping through their body. When matched with a experiment to see how their pulse changes when active, students can then compare and contrast how fast the toothpick is moving before and after movement.