The sentences are unlikely to be announced as a) sentences are rarely reported and b) the case will be heard by the Juvenile system.
You will find in general that sentences in Thailand for juveniles may seem very light compared to, say, the US. Judges here are reluctant to imprison juveniles, relying more on the family and the wider community, teachers, neighbours, local police, village headman, to act as a restraining influence and eyes and ears watching over juvenile offenders.