This is an annual design/build challenge using salvaged materials to raise money for a good cause. If you love Iron Chef for the creativity and competition, you are a DIY fanatic, a design junky, or a fan of Portland's quirky, innovative, and unique talent, then grab your friends and family and head down to the east waterfront on Labor Day for the Annual Dropbox Derby. It will be held on Monday, Sept. 2, from 10 a.m. - 4 p.m. at the Eastbank Esplanade Parking Lots, between SE. Salmon and Madison in Portland. More online by going to lovettdeconstruction.com.