I’ve read several places that those children’s foam puzzle mats work great for blocking. I really hate the idea of buying some expensive blocking board. I am curious to see if anyone has tried blocking with these foam boards, and if so, what you think of it. I’m trying to figure out if there is a specific type of foam and thickness that I should be looking for, or if any cheap foam mat will do. I usually just use my ironing board but I have a lap blanket that I need to block and the ironing board will obviously not work well for this.