Here's a shot of my leaves that I let sit out on a window sill for about 3 days. Plus the materials I used to complete the project (soil, egg cartons, leaves, succulent plants and pots).
And here's how I have displayed my leaves - as a living mandala. Don't forget, you can display your leaves however you like! It doesn't have to be pretty :)
I will update my project with a progress shot shortly.