The first one I really remember was ISU in 2000. Before then I went to a few with my parents and some family friends, but I only remember bits and pieces.
In 2000 my godfather brought me along on the Cat Tracker, which was super cool back then. Now, looking back it was the very definition of K-State0, but I don't really GAF. I sat club level on the east side, munched on peanuts and drank soda the entire time and watched my Cats dominate. I had just started playing pop-warner football at the time, and it was my first live game since I had started, so I soaked up every down. It's a pretty cool memory for me, as I imagine most people's first Cat games are.