prepare an electroscope with an availabble waste material.
U can take a jam bottle or any bottle. Take a paper clip and open it to make straight line. Take a cardboard sheet wider than mouth of bottle. Pierce a hole. Then insert paper clip in the hole and hang it on the mouth of bottle. Take 2 foil paper strips And attach them on the end of paper clip in side the bottle. Rub a pen refill on a woollen sweater and touch the outer end of the paper clip. If the two foil strips repel then the refill or any other substance is charged as same charge repel each other.