Welcome to the board from Ventura County, Southern California.
You can do all kinds of things with patches and strips that size. Have you made a sweat-shirt jacket? I have one I made (well it isn't totally finished) using a bunch of different fabrics. They would be great for making a tote or purse.
A Patchwork top would look nice too.
Are they all cotton samples? Whether they are all cotton or a blend of cotton and polyester, you would want to use all the same fabric on your garment.