The girls were playing on the seashore. They threw pebbles into the water and closely watched the agitated elements. The rules were simple: the one whose pebble is the first to be covered by a greenish wave can rush into the warm surf, trying to break away from the envious glances of her friends as soon as possible! After all, they are only waiting for the moment to break loose, in turn, and rush in pursuit! Laughing loudly, jumping over shells, raising sheaves of iridescent spray, pointing fingers at the shiny backs of dolphins - such is mischievous childhood, and it doesn’t matter where exactly it takes place!