well I dont know what kind of ornament you are making BUT I made one using a styrofoam ball and all you had to do is take a knife and push the edges of the fabric into the ball no far though just enough so it would stay I found the kids could help this way too. It has to be the sytrofoam though that you can see the air-spaces in it if that makes sense hope so cause I dot know how else to describe it .I would figure out how many fabrics you are going to use also then find that pattern you want to make and go fro there if is doesn't work well you have a block made for you next sampler quilt