The kids will sleep soundly after playing by the seaside at Spiaggia della Grotta del Saraceno. Search for crabs and other little critters, dip a toe in the water or throw a Frisbee around!
To visit this stretch of coastline, make tracks to Vasto. There are loads of other worthwhile attractions in the area, including Vasto Beach, Punta Aderci Nature Reserve, and Punta Penna Beach.