I have made some and love them. Apex designs http://apexembdesigns.com/3-d-puf...
has a dolphin for free to try.
thank you for information
EmbLibrary have instructions in their project tab. Am sure they would have some designs as well. Just do a search puffy foam.
I used the foam when I embroidered on a T-shirt with a dense design, it really helped to support the design. I also used on terry cloth instead of a topper stabilizer, used it for the nose of a lion turn out very cute with some dimension.