My boys have had a ball today with April Fool's, but not more than when they came home after school. They were downstairs, and found some fake blood from Halloween. They pretended to be fighting with each other (so hard to tell the fake from the real, since they do fight so often), then they spread some of the fake blood around on their faces and came running upstairs yelling and chasing each other. The girls thought that one had bloodied the others nose, and that the one with the bloody nose was trying to wipe it on the other. The girls were totally grossed out. The boys yelled, "April Fool's", and laughed their heads off.
We love this day. Sticks.