Coffee filters are a wonderful craft material you can find in the kitchen! My own love to paint them with watercolors--they create a beautiful stained-glass effect when taped to a window.
Cut leaf shapes out of unused coffee filters. Tip: Because most leaves are symmetrical, if you fold your coffee filter in half and cut away from the folded edge, you will make a symmetrical leaf. Small children may need some help cutting.
Protect you work surface with newsprint or a piece of cardboard (the coffee filters bleed and allows the markers and watercolor to go right through them!). Decorate the coffee filter leaves with markers and/or paint them with watercolors.
Be careful, they can tear if you push too hard with the markers or use too much water with the paint!