Why Do We Say ‘Time Flies’ When We’re Having Fun?

When you're having fun, your brain is busy enjoying the moment and doesn't pay much attention to time. Like when you’re playing a game, you don’t notice how fast it went by! But when you're bored, like waiting in line for ice cream, your brain notices every second and feels like time is crawling. It’s like having a friend who either zooms through the day or takes forever to get ready.