As promised, I worked up a tutorial for the fabric scrap boxes. Please let me know if anything is unclear or if you need any additional pictures.
Gather together your scraps. I'm working with yellow this time, but choose your color and then gather together everything that you think might work. Leftover triangles, odd ends from strip sets, orphan block, anything goes! In addition to the crumbs and strings, you will also need a few larger bits for lining. Don't worry about choosing your prettiest scraps for these, they won't show.
1. Square up your quilted crumb fabrics: 2 rectangles 7.5 by 10.5 and two squares 7.5 by 7.5.
2. Cut your lining fabrics to the same sizes : 2 rectangles 7.5 by 10.5 and two squares 7.5 by 7.5
3. Cut two rectangles for the bottom inside and outside, they are also 7.5 by 10.5.
4. Cut one extra piece for the handle, it is 6 by 7.5
5. One piece of firm cardboard or foam board which is cut 7 by 10 inches.
A note on sizes. This pattern can easily be modified to make a box in any size. I looked at the shelf where I wanted the boxes to go and figured out what I thought would work there. I've made smaller cubes before and they seemed too small to hold a decent amount of scraps. Though they work great for notions and supplies. Make something that will work in your space to hold the things you want to put in them.
Fold the sewn edge out of the way and line up the next edge, making sure that the raw edges are lined up and the corner not bunched under the sewing line.
Here is your finished box. It is right side in, but you can see how the corners work.
Repeat the above procedure for the lining fabric.
Sew the two ends to the two sides and sew those together to make a tube. Don't forget to stop sewing a quarter of and inch before you get to the bottom. This will be somewhat flimsier than the outside, but the sewing is the same.
Finally, sew the bottom inside to the sides of the lining fabric. This works exactly the same as the outside bottom with one important exception. Leave a large gap (at least 7 inches) along one long edge to insert the cardboard base and to turn the whole box right side out again in the end
Now the moment of truth! Turn the whole thing right side out by pulling everything out through the long gap that you left in the lining. Poke out the corners to make them pointy and trim away excess bulk if you need to. Press the top to make a nice crease where the inside meets the outside. Stitch along the top edge about a quarter of an inch from the edge to add some stability and shape.