I remember first seeing my brother play Theme Park when I was about 5 years old. I was fascinated! I had never even been to a real theme park at this point. I finally played it in my early teens, along side RCT1, (my brother was mean and wouldn't let me play) [cry]
I was 12 when Theme Park came out. Had a Windows 3.1 system, but had to boot to DOS to play Theme Park.