Step 1: Materials
Step 2: Make the base and arm
Students can typically create this part of the mousetrap without any difficulty. The process is straightforward and easy to follow. Just make sure that they leave a little bit of space at the end of the arm; the cube should not be at the very tip.
Step 3: Attach the rubberband
This is where it can get tricky. Most kids do not know how to tie this kind of knot, so show them how to do it a few times. Explain it like this: put the mousetrap on the rubberband; put one side of the rubberband through the other; pull tightly.
Attaching the rubberband is not very intuitive. Emphasize that the rubberband should go under the mousetrap, then loop it onto the end of the arm.
Alternatively, the rubberband can be attached in many different ways to create different amounts of tension, which may be desirable if you're concerned about safety.