If I were an adult for one day then I would quit work and apply for a job in Hawaii. I would then take the day off and go and have Japanese food for lunch, and Mexican food for dinner. I would then fly back home. I would watch tv and yo yo with my family for the night. Then when the kids are asleep, I would relax and fall asleep. I would then wake up as a kid.
That seems like a lot for one day!