I just learned this very easy technique and I love it. It's from L.K. Ludwig's book "Mixed Media Nature Journals." You'll be seeing more of this from me, combined with drawing. You just use water soluble crayons, dipped in water, and color the real leaf. Then you lay it face down on paper (or cloth) and rub. It gives you a gorgeous print! AND you can do it on the road, in your journal. Way cool.