Better ask your doctor if it is okay for a young child.
Do you know a European died in a sauna contest 2 days ago!!! 2 people went in the sauna room to compete for the world champion. 1 died, the other one in hospital.
Go find free trials at different health clubs or hotels.
Those Finnish dying on the news was in a 104℃ (有些報紙話110℃ 添) sauna. Normal saunas don't go that high. They were practically steaming/boiling their organs inside.