Little kids and mud

Our sandbox just got opened for the season, only to reveal a damp, muddy mess, due to some recent rain. Well that didn't stop my little buggers from crawling right in and getting themselves covered from head to toe with muddy sand. My 1 yo was having a ball, picking up handfuls and throwing them in the air, giggling the entire time. Yes, he was an awful mess after it was over, but that's what washing machines (and baths) are for, right?