Arcachon has a small aquarium with local eels, seahorses and tortoises and some tropical fish, stuffed animals from nearby waters and forests, and displays on local oyster-culture, sailing and prehistory. The town is a great size for families – compact yet containing all the amenities you need for a relaxing stay. The Le Moulleau district about 2km south of the centre is a favourite with chic French parents, for holidays in a calm, safe environment in which kids can roam freely. A great option for toddlers is  Kid Parc, an ‘adventure island’ of rides and activities just east of Arcachon at Gujan-Mestras, with the emphasis on younger kids. There’s also an Aqualand here.