Sewing!

You're welcome! For clearer instructions that come with good pictures, your daughter might also like to look at this reversible ballet bag tutorial, which is what I adapted the sleeve from. The changes I made were adding quilting to the exterior layer for additional iPad protection; flat-felling the bottom seam (just to get practice making flat-felled seams); not making gussets (because the iPad is thin enough not to require them); and doing the interior of the bag with one piece of fabric rather than with two, because I wanted to make a lined bag rather than a truly reversible one.