So, even though I can't cut material very straight or sew a straight line, I gave it a try.
Here is the material I got from Hobby Lobby - I think I could spend days in that store :)
Now here is the final product-
They aren't perfect and my crates don't match, but they will be perfect for my little ones. I can't wait for them to come in Monday and see them. And I'm pretty exctied about the storage I can use them for!