I have children older than you. It’s a matter of perspective - I think anyone under 50 is young, and no doubt in 10 years time I’ll think the same of anyone under 60. I don’t feel that I really grew up until I was well into my 30s, and my career didn’t really get anywhere before I was 40, but now before I know it I’m retired. Relish your youth - it’ll pass soon enough!