He suffered seven skull fractures in the accident, and his parents were told that Trenton would never be the same.
His mother, Jennifer Reindl, said she signed the papers to donate Trenton's organs because five kids needing transplants were a match.
"A man from the UAB organ donation came and talked to us in the family conference room about donating five organs to UAB children's hospital that would save five other children. We said yes, that also insured that they would continue to keep Trenton alive to clean his organs for the donation," Reindl told CBS News on Sunday.
But just a day before doctors were set to end Trenton's life support, he showed signs of cognition, and now he's slowly going through recovery.
"The next day he was scheduled to have his final brain wave test to call his time of death but his vitals spiked so they cancelled the test," Reindl said.