Ok I gotta an idea. I'll place an old two side blackboard outside on a sunny calm day. One side facing the sun the other not. I'll wet both sides. On the shady side I'll ask my grandson to keep blowing on it till it dries. My son and I can referee to see what wins sun or wind. Course we will need some chairs and a beverage or two. Might also be a good idea to do this away from the house as my daughter in law will certainly over react to this experiment.