METAL EARTH - 3D METAL MODEL KIT - MARS ROVER From steel sheets to Museum Quality 3D Models. Simply pop out the pieces and connect using tabs and holes. Mars Exploration Rover NASA's twin rovers, named Spirit and Opportunity, launched separately in 2003 and landed three weeks apart in January 2004. They made important discoveries about wet environments on ancient Mars that may have been favorable for supporting microbial life. Although Spirit ceased communicating with Earth in March 2010, Opportunity continues its work on the Red Planet. Includes illustrated instructions. No Glue or Solder needed. Number of sheets: 2 Sheets Difficulty: Challenging Collect them all! Recommended Age: 14+ Assembled Size: 3.67" x 3.35" x 2.34" (9.4 x 8.6 x 6 cm)