The 8-year-old boy was allegedly attacked in the bathroom of Bryant Elementary School in West Philadelphia at the end of October.
Earlier this month, the mother of the victim spoke to Action News.
"I felt helpless, it took him almost 7 hours to try to tell me what happened," the mother told Action News.
The advanced student is in the same grade and class as his alleged 10-year-old attackers.
The three juvenile suspects turned themselves into the Philadelphia Police Special Victims Unit today, accompanied by their parents.
Each of the youngsters is charged with attempted rape and indecent sexual assault.