alone beach enjoy female girl heat island model sea summer sun tropical woman adventure boat canoe enjoyment exercise fitness fun kayak outdoors paddle paddling people river sports activities boys pool safety snorkeling swimmers swimming swimming pool underwater water group health life ponytail relax active adventurous care children children’s-playground climbing community designed enjoying equipment families kids leisure move movement moving parents park parks planned play play-area playground playing prepared recreation recreational sand sandpits shade shaded shadows sheltered slides suburban sunlight sunshine supervise supervising supervision swings trees variety