For those of you with kids or grand kids. We created these and it's a good, cheap project the kids can do themselves for the most part....
(1) Use Microsoft Excel to create a grid of perfectly square columns/rows, then use Excel's palate of cell shades to "color in" in squares to make Minecraft zombies.
(2) Print 'em out, then use some 3M 77 adhesive spray to adhere the paper to some Owens Corning Foamular insulation
(3) Use a small scroll saw to cut them out. We used a Dremel Moto Saw and it cuts through the Foamular like nobody's business.
(4) Make a BB backstop if you don't already have one.
These are awesome knock-down targets for wintertime garage shootin' fun. They take many scores of hits from a Daisy Red Ryder before they start to become unusable.