If you are working towards collage there are several tools you might wish to collect. For lines--Howe Press of the Perkins School for the Blind has a spur wheel that is quite popular. The American Printing House for the Blind has a couple of tactile graphics kits. Dick Blick Art supplies has a collection of spur wheels also. I would suggest that you do a google search on each of these sources and see what is available. For shapes you might want to invest in some graphic artist stencils found at Office supplie stores. With these you can trace and then glue string or spur the shape or you could cut out the shape and to develop a whole object that you stack onto a piece of braille paper. One very good book that you might want to obtain is Tactile Graphics by Polly Edman. It is available from American Foundation for the Blind Press. Hope all of this info helps.