TheFork users who ate in Sanary-sur-Mer have said really good things about Le Comptoir de La Font des Pères, La Playa and Bistrot de Jef. Maybe you should give them a try!
Some of the more popular Good for families restaurants that are well suited to celebrate birthdays in Sanary-sur-Mer according to TheFork users include:
Le Comptoir de La Font des Pères, with a 9.4 rating
La Playa, with a 8.6 rating
René'Sens, with a 8.6 rating