This is the template I used to make Sokka's boomerang for a recent cosplay. The template was traced onto 10mm EVA foam, then flipped to mirror the other side. The two pieces were joined back to back to complete the full piece.
Kakashi's icha icha tactics book cover
This is the book cover I used for Kakashi's Icha Icha Tactics prop book. I provided a version that can be printed on 11x17 or two 8.5x11 pages that can be pieced together and glued to a book. I extended the colored background so it can accommodate a standard novel (a 300-400 page novel is recommended). If you don't have one you can purchase one at the thrift store for $1.