Where to stay in the french riviera with a toddler?

I was looking for advice for an upcoming french riviera trip at the end of May. We will be visiting with our 1.5 year old toddler for a total of 9 days. Does anyone have advice on where to stay and recommendations day trips/activities that are appropriate for our toddler as well?

What we are hoping for:
First priority is to have pool and beach access where we stay for our toddler to enjoy. We were hoping to experience sightseeing, beautiful nature and architecture, unique activities to the region, new culture, great food. We’ve never been to France and are open to suggestions. Thanks in advance!!!