I think that it’s really important on your first date, and on all your dates, to be as authentic and real as possible.
Why? Because your future significant other is going to want the real you. You showing up as the realest, most authentic version of yourself is what’s going to weed out all the people who are not your person.
So do you have kids? Yes. Should you talk about them? If they are significant to you, then yes, you should talk about them, because your significant other would want to know. And if a date doesn’t want to know them, then they’re not your person.