And Gilbert chemistry sets. I dyed the neighborhood bully blue with mine. When his mother phoned mine in high dudgeon my mother was a bit bemused. What could I possibly have done to him?

As he *was* the neighborhood bully she was also amused.

Ferric ammonium sulphate and sodium ferrocyanide when dissolved in water react to form Prussian blue, the active element in washday bluing. I believe Mrs. Turnbull's bluing is still available but pretty old fashioned.

He punched me a few times. I ran into the house and locked the doors. Whipped up a batch and taunted him from a second story window. When he came near I let him have it.

One of my proudest days of fourth grade. :-)