. it's illegal to have bunk beds in your child's room if they're under age. I do not think there is a law about same-sex children sharing a room, .
I have a 2 & 4 year old and we actually just bought bunk beds.. As long as there is a good railing on top, your son should be fine.. told me that it is against my state law for a child under the age of 6 to sleep on the top bunk.
Child Safety and Accident Prevention Concern – bunk beds may present. Healthy Workplaces for all Ages, European Safety and Health at Work. . Do not lot allow children to play under bunk beds unless the area under the. Make sure there is nothing sticking out from the bed which could catch in your child's clothing.