Primary Importance

Yesterday I had a babysitting call.  The last-minute kind where something unforeseen arises, and a family needs someone to watch the kids in the next five minutes.  I was free for the morning so I rushed right over.  The family has four little boys ages 7 and under, and when I arrived the two youngest were sitting in the kitchen eating their oatmeal, while the two eldest were in the bathroom brushing their teeth.  It had been a while since I babysat for this family, and Boy #1 came rushing out to show me his new toothbrush - one that could "spin" and lit up green when he pressed a button - which I duly admired with the requisite level of awe.

When Boy #1 had gone back to finish brushing, Boy #3 looked up from his oatmeal.
"It lights up red, too." he said "Red and green.  Primary Colors." he added importantly.
"Is green a primary color?"  I asked.
"Yes," he nodded his head with conviction, "Red is the color of the 49ers and green is the color of the Packers."
"Well" I conceded, "I guess that would make them primary".