Several years ago, I picked up a french provincial head and foot board at a garage sale for $5. (ETA: There were no side rails, which is why it was only $5.) I intended to make a bench with it but when I got it home, I realized the foot board was much too low to attach the seat. So, it languished in my shop. Sometimes, it takes a long time for problem-solving inspiration to strike.
Several months ago, inspiration struck. Why not put the seat platform up where it should be and put baskets in the open space?! As you can see, that's just what I did. I purchased the baskets from Ikea first so I would know what size to make the openings. Because this was a design-as-you-build project with lots of fiddle-factor, I didn't make a tutorial. There are lots of them online, anyway. I do have a few progress shots to give you an idea how I built it.