I made it by patchworking felt squares together in rows and then sewing the rows together. When you machine patchwork, it's hard to get patchwork to be exactly even, so I made these ones more mismatched. Nevertheless, these ones seemed to turn out particularly wonky - more so than the iPad case- sorry Ben!
I then sandwiched each piece with two layers of wadding (for extra protection) and some blue lining material and sewed round the outside.
Finally, I sewed both pieces together (patches facing inwards) to make an 'envelope' and then turned it inside out to make the case. The flap tucks in and a loop of fabric and button keeps it all together. Initially, the flap was going to go on the outside, like the ipad case I made before - but because I padded the flap as well, it stuck out too much at the corners and looked weird. It worked better tucked in so I tried this new way of fastening instead.
I've had a few people asking about these - so if you want to commission one, drop me an email at firstname.lastname@example.org. At the moment, while I'm still practicing, I'm not charging much :)