When I was little, my favorite "game" to play during summer vacation was school. I missed school and wanted to go back. I wanted to learn. This was before my family got a computer, way before wifi and smartphones were invented, so it's not like I could just go on educational websites any time I wanted. So if I had a workbook from school that I didn't finish, I finished it. If we went to the library, I usually played an educational game installed on the computer. One time all the computers were filled, so I got an encyclopedia, turned to a random page, and copied down notes about jaundice. In fourth grade, my school gave out old copies of an outdated science book and I studied from it for fun. Even as an adult, I still like learning for the sake of learning. I'm teaching myself French just because. I still have some old textbooks in storage in case I get bored one day.