Wallyworld is evil, but also economical and convenient. I now have sandals again (not expensive, but also hopefully not cheap enough that they're crap), some vivid blue not-so-nasty acrylic for hyperbolic plane(s), and a splurge on some glass beads.
I had also intended on getting some feltable wool for slippers, but they didn't have Patons Classic Wool like I wanted. They didn't even have Lion Wool. They did have some sort of non-obvious-brand-name "mercericed wool", but I have no idea how mercerizing affects feltability, and the balls had no indication of yardage either. With a tight budget, I want to know what I'm buying will work.
I had intended on buying sandals from a store other than Wallyworld, but I happened to check the shoe section on my way to the cash register. I couldn't find any obvious faults with these, and they're pretty much exactly what I want. Hopefully they'll last at least until the more expensive sandals go on clearance. ;)