We recently needed three 18x24 poster frames for some LEGO wall art in our oldest son's bedroom. We were surprised to find that they can be a little on the spendy side, coming in at around $12-20 a piece. That's pretty steep, considering that we only had about $7 into the 3 posters we were trying to frame! Fortunately, we were looking for something that wasn't very ornate, so I decided to make some from plain old 1x2 pre-primed MDF boards. Total cost: Less than $4/frame Time to Build: Less ...