What does mother give Waverly when she behaves in the candy store?

When Waverly is six years old, she cries for a bag of salted plums in the store. Her mother tells her, "Wise guy, he not go against wind," and the next time they are in the store, Waverly is silent. As a result, "When my mother finished her shopping, she quietly plucked a small bag of plums from the rack." By keeping her peace, and proving that she is strong enough not to beg for the candy, Waverly earns it in the end.