Bring anatomy to life with this engaging, hands-on STEM activity! In this project, students build a working model of a human hand to explore how tendons—not muscles in the fingers—help the hand move. Using a hand template, straws as “bones,” and string as “tendons,” students create a movable hand model that demonstrates how pulling tendons causes fingers to bend and move. This activity is perfect for teaching the muscular and skeletal systems, biomechanics, engineering design, or human body scie