The combustion process does not stop until the fire triangle is broken. Once fire has changed something it cannot be reversed . Fire is interesting, but, it is not a plaything. When older kids are injured by fire it is usually because they have been playing or experimenting with products that are reactive or combustible. They didn't think anything bad would happen.
Fire is a tool.
Don't use fire unless there is a responsible adult with you. It is dangerous and is against the law. Wind can spread fire rapidly to occupied homes. It also keeps firefighters from going to other emergencies where someone may be in danger. Remember that it is important to tell on someone that is doing something dangerous or illegal.