The message
from Chris Bacon contains these words:

That's a useful idea. Might stop 'em surprising someone
in 'Stralia, too. Can't have the sand too deep, for
safety reasons.

Next time you're at the beach, come back with a bucket of seashells -
the kids love finding treasures in the sand.

--
Skipweasel
Pay no attention to that man behind the curtain.