One day last week the girls in my last-period class remained at the gym for a personal safety class. So I had ten boys to keep happy in physical science, without doing anything that would require being repeated the next day for the girls. A bigger job than it may appear. I looked in the science lab cupboards and found an electricity kit that had been there for some time and had not apparently been used. So I got it down and thought - Let them have at it. And have at it they did. They had a wonderful time!