Like this:
http://infusionarts.com/gallery/woodlands_shadowbox_01.html
Or this: it's a how to!
http://www.ehow.com/videos-on_5190_make-shadow-box.html
Ahhh, i just unpacked my crafting and art supplies and now I want to make one too. You can make one to custom fit your shell if you can't find one in stores, here they're available at framing and crafting places. If you seal it up really well it also helps preserve the contents. Enjoy!
