BROOKLYN - A 3-year-old boy was safely returned home this afternoon after he went missing on his way to school.The child was en route to school on the first day of class when he was placed on the wrong bus on Saratoga Avenue. Despite the mix-up, the boy was taken to the right school, but his parents became concerned that he went missing and got the Department of Education and police involved.At around noon, a fleet of police vehicles pulled up to an apartment building in Brownsville where the boy lives and returned the 3-year-old to his family.