Advertising And Algebra

When my daughter was five years old -- before she could add or subtract -- I taught her algebra.

One day we were in the car. She must have heard some kids talking about it in kindergarten or heard some reference to it on Sesame Street because she suddenly asked me, "Dad, what's algebra?"

"I'll tell you in a minute," I said. "First I want to ask you a question. That cookie you're eating cost a