I have a 10 month old baby boy and he's my first. I just read another thread about OP saying she'd had enough of parenting teens. The thought of my little baby boy growing up into a young man makes me so sad.
I know it's a long way off but time flies 
What's it like when your babies grow up? Is it difficult or does it just feel like a natural adjustment? He's my first DC so I've never experienced it before