2nd Grade Electricity Experiments

We read a story about Ellie Electricity. Then we made a hypothesis about how a bubble will react to a balloon that has been rubbed on a wool sock (or your head).  We concluded that the bubble and balloon had opposite electrical charges because they were attracted to each other.  If they had the same charges, they would repel each other.  We did a bonus activity with a balloon and tissue paper.  We concluded that the tissue paper and balloon also have opposite charges.