By Allyson Harris—Sun Chronicle Staff Writer
Thomas Sirois, a blond, chubby-faced toddler, came running out of the back room of Sirois Bicycle Shop to inspect a visitor. Holding up a bottle, he studied the visitor as much as he does his father, uncle, and grandfather repairing bikes in the store. "He is already working with tools," said his grandfather, Robert Sirois, known as Pepere to the youngster. Thomas, almost two years old, can differentiate among an allen wrench, a 15-millimeter wrench, and other tools. "If you tell him to get a wrench for this nut, he'll pick it up off the bench," said his father, Joseph, 21, pointing to a nut on the handlebars of a small children's bike.