gender secret for our kids

Ooh, how exciting, your fourth baby already!
Well, I don't know, to be honest.
It's impressive that you can keep the secret from your kids.
I told my children, my two little girls, that mom is pregnant.
And I also let them think about the name.
Of course, my husband and I ultimately choose the name together ourselves.
But I do involve them
I want them to know that they fully belong in this process.
And that we experience and share this as a whole family.
I couldn't do that with my first little girl because she was too young when I was pregnant with the second.
But now it's possible since I'm expecting the third.
It's nice how you can keep it such a secret from them.
And nice how you want to tell them in a special way.
But unfortunately, I don't know, no ideas.