Several variations of the bouncing ground targets for good prices. As always, $5 shipping on anything from Woot. Cheap backpacks and hammocks for any prepper folks too. I think the backpacks are 13.99.
http://www.woot.com/plus/do-all-outdoors-bouncing-targets
http://www.woot.com/plus/do-all-outdoors-bouncing-targets