How do you make a model human arm with pins balloons glue rubber bands tape paper towel rolls?

To create a model human arm, start by using paper towel rolls as the arm's structure and attach them together with tape for articulation. Use rubber bands to mimic muscles by connecting them between different segments of the arm. Balloons can serve as joints or additional muscle groups; inflate them slightly and secure them with glue or tape. Finally, use pins to reinforce connections and ensure stability throughout the model.