I was only aiming to make ONE as a gift for a friend but once you get the squares ready to put together sometimes they don't fit or just don't match as well as you thought they would so you go through your stash of finished "poptarts" and you don't always find quite the right thing but you Do find a few squares that look really great together so you set them aside for other pouches but you've still got to make just one more patch and while you're working on that people see what you're doing and you can tell they really like it so you pick out fabric for pouches just for them and ... it's just endless, lol.
I didn't understand this at first but check out the second link for a step by step tutorial. Very clever, doing both booties at once. As the author says "Felting a boot without any sewn seams can be a long job. It often takes beginners several hours to get the job done and then they are too tired to make the second one. This is OK for those of you who are felting for people with only one foot..." LOL