We have concrete patio and currently we have plastic sandbox there.
However, this sandbox traps moisture inside, and now that rains are over
(north California) sand is very wet and simply discussing.
I am thinking about building new wooden sandbox for kids, but I am
wondering hat to do with moisture. Draining down is not an option due
to concrete. I am thinking about having "vents" in the cover so
moisture will escape, but I am not quite sure what exactly I need to do
and I don't want to have caoer too heavy.