I added some appliqué just for fun, using the lining fabric. The red fabric is canvas (left over from Barb's baskets) and the polka dotted fabric is a quilting weight cotton.
For the straps, I used some 1"-wide cotton webbing. For fun, I triple stitched some red and turquoise on them. Each strap is 52" long, so it took a REEEEEEEEALLY long time to do all that stitching. It does make the straps a lot more fun, though.
Here is a shot with the bag closed.
I love the lining fabric. Multi-colored polka dots are always fun.
A note about the tutorial -- the instructions say to leave a gap for the straps in the lining. Then, in the comments, a reader points out to the author that those gaps are not really necessary and the author agreed. I hadn't read the comments before I sewed Maisie's backpack, but I remember wondering why the heck those gaps were in the lining. This time, I read the comments first and skipped that unnecessary (but totally harmless) step!