These are not made out of paper but are FOR paper crafting so I felt they belonged on the paper board.
I have tons of stencils for paper crafting - I cut them on my cricut. It’s a cheap way to get a lot of variety (if you already have a cricut)
But I don’t have a lot of stamps and what I have aren’t really generic background stamps.
So I saw some videos on making them out of fun foam sheets. it looked super easy. The videos I saw used sticker backed foam sheets but I couldn’t find any but I have all kinds of glue so bought non-stickered sheets.
Tip: I tried several glues and the best glue I found was a Scotch glue pen which is my favorite paper crafting glue.
These are not the neatest but they are just for me so I didn’t worry about it.
They take a few hours to dry. if you try to use them before that the pieces slide around. I used a brayer to get the paint on them but you could probably use a paint brush or makeup sponge.
the more paint you use, the more coverage. but I liked the distressed look esp as these will mostly be used for backgrounds, etc.