Crocheting a stool cover with commercial t-shirt yarn is one of my all time favorite projects. It goes really quickly, and the results are wonderful! (Okay, I'll admit, these are not my favorite colors, but am trying to use up everything I have....a few years back t-shirt yarn was scarce in Israel so I bought whatever colors I found!) Plus, because the t-shirt yarn is stretchy, the cover can be made to fit exactly on your stool, like a shower cap of sorts, whereas stool covers made with regular yarn do generally need a draw string in order for the cover to sit tightly on the stool.
This pattern only takes seven rounds to cover the top of the stool, so making two covers, or even enough to go around a table is totally realistic, so get some stools and some t-shirt yarn and lets create something fabulous!