Many discussions of green design revolve around architecture and transportation concepts, but sometimes examples of great design can be found in much simpler places. Like a child’s toy box, or maybe your own backyard! Throughout the past year, Inhabitots has reported on countless awe-inspiring innovations in the realm of sustainable design for children. From fairy castle treehouses to cool light-up circuit stickers, there are plenty of designs that left us impressed and inspired. Help us decide which one of these green kids design stories deserve to be crowned best of 2013! Follow the link below to cast your vote.