Levent Konuk / Shutterstock.com Legos Put in Garbage Cart/Bin Levent Konuk / Shutterstock.com If your Legos are in good condition, consider donating them. Wash Before You Donate It’s a good practice to wash Legos before you donate or sell them. Soak Legos in warm water with some detergent and then air dry. Ways to Reduce CTR Photos / Shutterstock.com Buy Used Legos Legos are made from plastic #7 and so are incredibly difficult to recycle. So the best way to prevent Legos from sitting in a landfill is to buy used ones. This approach keeps the Legos already out there in circulation. Ways to Reuse Donate Legos to Lego Replay Send your unwanted Legos to Lego Replay which works with Teach for America and the Boys & Girls Clubs of Boston to give thousands of children the chance to learn through play. Did You Know? Lego to Spend $1B on Going Green The World’s Most Popular Toy According to a 2010 survey by Firebox.com and Toyology.com, Legos are the most popular toy ever manufactured.