Step 2: Cut your Squares
This part is super easy.
With your solid fabric, (in my case, muslin) cut a square that is 7". How many squares you cut is entirely up to you and the size project you are working on. I tend to cut a handful at a time, since it'd all come from the same bolt of muslin anyway, and since I'm not entirely sure what these blocks will turn into eventually.
Also cut 2" squares of your bright prints, in a variety. Use scraps from other projects and mix it up a bit! Or better yet, this would look lovely as a memory quilt, using old cut up clothing!