The fabulous wool felt I've been using for the bunnies, hearts, and ornament birds is from Purl Soho. This is some of the finest material I have worked with and very easy for kids to manage. The felt come in bundles of 8 and measure 8-inches x 12-inches. One piece is enough to make 2 soft toy bunnies or 2 bird ornaments. The scraps are also very useful and the colors brilliant. So fun.
Here I used one layer of felt to make a book mark valentine bunny, which means you could make 4 projects from one piece of 8-inches x 12-inches felt. A space at the top of the heart remains open for a secret valentine note.