How many blueberries can you eat before you turn BLUE?

Libby re-discovered her love for blueberries this morning. After she finished her cereal, I gave her a handful of sweet berries. She promptly stuffed each one into her mouth and begged for more. This cycle of stuffing mouth/begging "more, peeeese"/signing "please"/receiving more continued until I cut her off at a half-pint and she threw herself on the floor. She did finish off the pint for a snack after her nap though.