Paris ,france

Paris is a big city, so recommendations depend on where you’re staying in Paris.

I wonder what "budget friendly" would mean for this person?

Try googling “affordable, casual restaurants in Paris” for some ideas.

there are a couple of Flunch locations in Paris that the kiddoes might like... or maybe Hippopotamus which are in a lot of locations.

How nice for all of you! What is your budget? What do the kids like to eat? Can they withstand 1 1/2 hour lunches, 2 hour dinners? That's the norm for sit-down service. What sights will you be seeing--e.g. Notre Dame at 11:00 a.m.? If we know the answers to these questions, we can make more informed suggestions. It's always wise to make reservations, too. Your trip is coming up soon. You must be very excited.

Breizh Cafer (or any other creperie) for crepes and galettes.

https://en.breizhcafe.com/