Weekday wedding. How to make people invited not feel obligated to attend?

It's really hard! I am trying to word something so that our guests don't feel obligated to bring their children. We actually would really like the children we're inviting to come, but I don't want their parents to feel obligated to bring them if they would rather get a babysitter. When I asked on here about wording, the consensus was that it sounded like I didn't want children there, however I put it! I think this is the same. People won't know for sure that everyone got the same poem/invite/text, so they might think you are trying to put them off and don't want them there!

You're probably best not putting anything in writing but roping in trusted family/friends to put the word around that you don't want people to feel pressured to come. That's what we're doing for the children thing, and also gifts.

If you don't have that many guests, maybe word of mouth is the way forward. If you have loads, then it's probably best to just leave it.

Most people won't take time off unless they want to.

Omg, I never realized it would be this hard thinking about the best words for making such a letter. I think if you know someone you invited will be feeling obligated, then it's time for you to let them know over-the-phone that it will still be okay if they decide to not attend due to work or other important reasons.