Last month we built Instabench1, made from 2″x8″ x two 10′ boards.
It turned out so well we decided to built two more, to place around various gardens.

They have shown to be very sturdy and even comfortable. The design lends itself to modification, so we modified #2 and 3 to be a little higher with a greater front to back stance (giving it more stability) and a little wider.

They still need to be sanded down and then painted.