It's flat. No demanding climbs: you get around easily by bike, with a child seat for the little ones. Walks in town are simple and within everyone's reach too.
During the summer the whole town centre is pedestrian-only. The streets are quiet, an added bonus when travelling with children.
The sea is gentle. On the eastern side the beaches are sandy, with a shallow, gradual entry into the water and clear seabeds: ideal for first swims and for playing at the shore.