Roger Caillois was a man who liked to study games and play. He found that games were like puzzles that people liked to solve. He thought that games were important because they helped people learn how to think and work together.
Think of games like hide and seek, tag, or chess. These are all games that are fun to play but they also help us learn things. When we play hide and seek, we learn how to hide and be quiet, and we also learn how to find other people. When we play tag, we learn how to run and work together as a team. When we play chess, we learn how to think ahead and plan our moves.
Roger Caillois studied games like this and wrote about why they were important. He even made up some new games that people could play to learn different things. His ideas helped people understand how games could be more than just fun, they could be educational and meaningful too.