As an ADULT, I spend my free time on sleeping. Because of too much activities during regular days at work, in which it makes me exhausted, a good day of sleep revives me and my energy. Thats why sleeping is very precious to me as an adult. Actually, most of my free time, I am usually doing work related stuffs and other productive things that will make me earn for my family. Having  free time spent for sleeping are very valuable for adults.