Carefully lined up like contestants in a beauty pageant, the bottles of polish preen in hues of pink, red, and purple, anxiously waiting to be selected. Once plucked from the group, they make their way onto the toenails and fingernails of customers inside Vivi Nails. The nail technicians not only dispense mani-pedis for adults, but also pamper children’s flippers during kiddie pedicures and rounds of “This Little Piggy.”