Regular white paper, leafs, twigs and anything else that is relatively flat, colored pencils or crayons.
Lay a leaf on a table and place paper on top. Holding the paper where the leaf is, rub pencil or crayon over area. The shape of the leaf will come through. Select another leaf and repeat on another section of the paper.
“You can use any item that is not thick and has some texture. Coins, paper clips, string and pieces of Bristol board can also be used.”