I am not a fan of the beach well not sitting on it all day,I prefer it when the tide is going out and it is empty of people. What I have not seen is kids with buckets and spades making castles or just playing in the sand, they tend to be in the water or playing ball games.
Do spanish kids not play in the sand ? does dog poo and general rubbish have a part to play in that I wonder ?
Another thing I notice on my return from UK is that I seldom, if ever, hear the neighbours kids laughing

kids around here when out playing seem to shout and scream but no laughing ...