This week in tech, we created electroscopes. The materials needed was a balloon, a glass, tinfoil, a paper clip and cardboard. Fist you had to get your cardboard and cut a circle and cut a line through it until you get to the middle. Next, cut your tinfoil in to two tear drops. Stick the paper clip through the hole and put the teardrops on there. Tape that onto the top of the glass. Then rub the balloon on a sweater or your hair and bring it close to the glass without touching. This will make the test drops move. I think that they move because the energy is creating a change in direction from the electrons and they are resisting the pull.