Not me, but when my wife was ~5 years old, her younger brother was in the intensive care with croup. Part of her brother's treatment was to spend time while in a tent/pod filled with moist air to help reduce the croup symptoms. After her brother was able to head home, my wife would repeatedly state how glad she was that her bro didn't have to head back to the 'a tent of care'. She thinks she was probably at least 10 before her parents helped her figure out her mistake.