To give the illusion that each corner is a single block of wood, and to avoid nighttime skinned shin injuries, the edges are rounded over, using a half-inch roundover bit.
The roundover bit has a guide on it, so you don't need the fence. However, to reduce chatter when first contacting the bit, there is a post screwed into the router table surface. Holding the piece up against that post when contacting the bit makes it easier to maintain control while waiting to contact the guide.
I did the outside edges first, so the bit would run along the curved surface when doing the top and bottom.
I then did the bottom, and finally the top.
I was originally going to round over that corner, but my parents convinced me not to, to add a point of contrast.