First real beach day

What happens when it actually reaches 70 degrees in Seattle?  Beach day of course.  Any hotter and you would absolutely have to stay at home with air conditioning, but 70 degrees is just hot enough to justify taking your pants off and playing in the water while you get a sunburn (which, at this point, I welcome!).  Anna seems to have a fascination with big sticks (though she is not very good at the walking softly part!).