I had some left over curtain lining in white and lots of felt. I cut a rectangle and the ends were frayed. I was just going to hand stitch the ends, but the Hubby chimed in (more about that later). I cut various colors of felt into 4X4 inch squares. I then cut smaller squares from scraps of felt. I glued the scrap pieces on the white rectangle with proper spacing to place the squares.
Elle then matched the large squares to the small squares by color.
After she had them all placed, we glued them down. It took FOREVER, but was fun ( I am also not sure why my hand is missing from my sweatshirt sleeve in the pic???)
We used it for a scavenger hunt too! Elle came back with little trinkets from around our home and placed them on the corresponding colors. I am planning to print out color words and have Ella match them to the quilt.