It's hardly the first R2-D2 Lego set, but set #75308 is by far the most detailed. Launched to celebrate the 50th anniversary of Lucasfilm and is comprised of 2,314 pieces. Among the various details are a retractable middle leg, hidden tools (including Luke's lightsaber hilt in the rotating head), and a periscope. It measures over a foot tall and arrives with an R2-D2 minifig, a special Lucasfilm 50th anniversary brick, and a buildable display stand with an information plaque.