If you're set on Spain, mainland Spain (as opposed to the Canary Islands) there are lots of choices for family-friendly, so Google will probably instruct you best. It also depends on where you want to be. Up near Tarragona (a gorgeous UNESCO heritage town) I've visited "El Templo del Sol," which is kind of a campground sort of place- very clean, with a nice pool, and great beach with mountains behind you. About halfway down the coast, near Almeria, is Vera Playa, a huge resort area where you have options of either a big resort hotel (the Vera Playa Club Hotel) or a self-catering apartment in a half dozen different communities. Two-mile long beach. If you go apartment, make sure you ask for one that's been recently renovated, as some are nicer than others. Then, further down, nearer to Gibraltar, is Costa Natura, a set of about 200 Moorish-styled apartments set on a hillside, also on a nice beach. I've read there are lots of other places inland, so you could really do a driving tour of Spain!