Hi,
New to this board, but I have made stencils. Trace the pattern onto some mylar (a thin plastic material) with permanent marker. Then use a small xacto knife to cut it out. I use the xacto knife with an orange handle, very cheap and small, so it is easy to use. Cut the stencil (mylar) out on glass for best results. Hope this helps. I have done this for many Girl Scout projects in the past. Mylar holds up well with lots of handling.