The story has gone viral as news clips of the ceremony have been viewed more than one million times and pictures of the event have been shared by the tens of thousands on social media.
Judge Patricia Gardner told local news channel WZZM it was an "incredible" scene.
Even though most MI adoptions are confidential, on Adoption Day Thursday the families share and celebrate this momentous day with anyone and everyone they want to.
Kent County's family court finalized the adoption of 37 children (all of who came from the foster care system) this week on its annual Adoption Day Thursday.
"Giving a kid a permanent home, a forever family, is just the best gift you can give anybody", said Melvin.
So while Michael's adoption was being finalised, there was an entire row of hearts in the background as his classmates waved them.
"We asked him, and he was just like, 'You know the class is kind of my family.' And he wanted them to be there", Eaton told the station. And, there wasn't a dry eye in the courthouse.
The boy had been fostered for about a year by Eaton and his wife, Andrea Melvin, before becoming a permanent family member, according to WOOD TV.
The kindergartners offered the most touching answers, standing up and telling the court, "I love Michael" or "Michael's my best friend", his father said.