I've never found crazy blocks to be simple or quick! Call it a bed runner and be finished with it.
Blocks like for the colorwash quilt take about 5 minutes to make, and they can be scrappy, doesn't need to be a color wash.
That said, the minute you put your hands in a scrap bucket it swells/fluffs to twice it's size
If they feel like a burden, offer them on, or send them to the landfill, they will compost down in no time, all natural.