Revealing mistake: When the fire starts, you can see a massive spark from whatever starting mechanism was used. The blunt wouldn't make a spark that big.
Revealing mistake: When Chucky follows Lexy as she's about to open the door and let the other kids into her house, the way Chucky is moving is very unnatural. He's moving less like he's walking and more like he's on some sort of track. He's moving more like he's gliding than walking.
Answer: They were blamed for the death of Jake's foster brother, which was deemed a terrible accident, and they were sent to the reform school as a punishment. Presumably, when they had to leave the reform school given what happened, they were instead given community service as punishment.
TedStixon