Paris - special occassion restaurant with kids

[andgoodnessknows]

Celebrating a milestone birthday in Paris and small group includes two kids 9 and 6. Can anyone recommend a restaurant that’s nice (but not overly fancy?!) for lunch or dinner that would work for kids? Or a nice place to have a slice of cake? Staying near Opera but can travel around - would welcome anything suitable for vegetarians too! TIA

Pink Mamma, Joya, Cocoricains and Gruppimomo all have a kids menu and will have a decent range of vegetarian options.
Le Ptit Piano has loads of vegetarian options. No kids menu but there’s lots the kids would eat from the main menu and they’re very accommodating.
La Brasserie du Louvre is ‘white tablecloth’ fancy but not too fancy for kids and it’s got a kids menu.

Thank you!! @forgottenmyphone