If there is a tractor suppy store near you then your in luck. The next time they bring in a load of trailers go to the store and ask or take the foam blocks that the trailers are stacked on for shiping. They stop the arrow fast and then you have 6 sides to shoot at and it FREE and you can make a wall of them or just take one there real light. If you ask to have a block of foam just make up some good reason like your kids school project or else they might start selling them as blocks.