Contribute to a work of art and do something good for the environment. Mystery Build is collecting 10,000 plastic bottle caps to create two community art projects during the Burlington Maker Faire on April 28, and the Raleigh Maker Faire on June 16. If you donate 250 plastic caps we will send you a free 2012 Mystery Build Kit - an art contest with $10,000 in prizes. Soda bottles are best, but also other plastic caps like salad dressing or shampoo bottles. Email info@mysterybuild.com for…