Thug stole bracelet from four-year-old Bronx boy in city’s third toddler robbery

Bling-toting pre-schoolers are proving easy prey for New York’s most cowardly crooks. A 4-year-old Bronx boy became the third toddler since July to lose fancy jewelry to a robber when a teenage thug grabbed a gold bracelet from his wrist, police sources told The Post yesterday. Robert Rendon was…