The kids will sleep soundly after frolicking by the water at Cala Ribellet. Look for crabs and other little critters, stick a toe in the water or toss a Frisbee around!
When you've spent a bit of time at this stretch of coastline in L'Ametlla de Mar, why not check out L'Ametlla de Mar Beach, El Torn Beach, and Sant Jordi Beach? They're not too far from Cala Ribellet and also popular with travelers.