The kids will sleep soundly after frolicking by the seaside at Rimigliano Coastal Park. Look for crabs and other little critters, stick a toe in the water or toss a Frisbee around!
You'll find this stretch of coastline in San Vincenzo. Once you've done all you can at Rimigliano Coastal Park, consider visiting nearby Calidario Terme Etrusche, Dog Beach San Vincenzo, and Hotel Terme di Caldana Public Pool.