I was going to start a new thread regarding home made targets, but I found this!
My crude outdoor target box. Bed slates, paddling pool, thin foam insulation and a lot of screws, pins and tacks.
Very crudely put together. Top slates are removable, stripped a thick paddling into strips and tacked along each slate. Some thin foam insulation at the back of the box.
Doesn't look pretty, but I works!