Start your own composting worm farm! Complete with starter box of worms, a bag of bedding, a bag of food to carry them over (dried bread crumbs & dehydrated carrot pulp, from when I make carrot juice), and a 6-page instruction pamphlet / crash course on how to raise Red Wigglers in your own backyard, kitchen, or where-have-you (Thanks to WSU Whatcom County Extension).
These were a big hit!