The kids will sleep soundly after frolicking by the water at Playa de La Ribera. Look for cute critters like crabs and snails, dip a toe in the water or throw a Frisbee around!
You'll be spoiled for sightseeing choice when visiting Ceuta. Playa de La Ribera is a good place to start here, but there are many other fine places to discover. Fnideq Beach, Fnideq Mosque, and Gran Casino de Ceuta are not far from the stretch of coastline and will fill in your day nicely.