Just to the west of the town, on the road to Reaup, is the Lac de Lislebonne, a little 'base de loisirs' with a small lake. The swimming is good and safe, and there is a sandy beach (and shade).
Many a day has been spent lounging here in the woods watching the children swim. The tricky bit is dragging them out when the sun goes down. Just tell them "We''l come back tomorrow"
Equipment: Bring stress, worries and anxiety, but leave them on the grass when you pack up. Just tip-toe away from them.