Thanks, everyone.
I have the Weird Al one basted, so hoping to quilt it tomorrow night (I'll quilt along the circles and the lines in the flag).
I'll take a photo of the jar material, but I found it at Joanne Fabrics (they don't have it online). The jars are filled with things like worms, spiders, vampire teeth, fish skeletons, etc. I can a lot, and some stuff can get really messy, so I've been wanting to make an apron.
I really like the dragon/knight/castle panel, so I bought a couple more for later. I wish my son was still little, it would have made awesome curtains for his bedroom!