A sign includes a main body having a first surface and a second surface and an
overlay removably attachable to the first surface or the second surface of the
main body, and at least two fasteners attached to the overlay for removably securing
the overlay to the first surface or the second surface. Each fastener can pass
through an oversized hole in the overlay and be movably secured to the overlay
with a washer. Each washer spaces the overlay from the main body when the overlay
is attached to the main body. The main body can include a plurality of hollow cells
within the main body.
