There?s no thrill quite like launching a model rocket, watching it streak skyward, reach peak altitude, and then return gently to earth. When you build them, the thrill is even better than ever. Thanks to Estes model rocketry, kids can explore the wondrous world of science while experimenting with different combinations of rockets, engines and accessories to better understand how rockets reach outer space.SKILL LEVEL: With moderate building and finishing skills, the Destination Mars Mars Longship is perfect for this Advanced level rocket.RECOMMENDED ENGINES: D12-3, E12-4PROJECTED ALTITUDE: 500 ft. (152 m) on a E12-4ESTIMATED ASSEMBLY TIME: 6 Hours (glue drying time not included) The workhorse of the colonization fleet and a marvel of dynamic engineering, the Destination Mars Mars Longship planetary transport is the lifeline connecting old Earth to new Mars Add it to your Mars fleet today First deployed in 2052 to support the expanding Mars outpost, the Mars Longship carries crucial supplies and eager colonists from Earth to Mars orbit, completing a circuit between planets every 18 months. But to the colonists the massive vessel is more than a cargo ship ? with each return, it?s a vital link to the old planet and a reminder of home. WHAT YOU NEED TO BUILD: Scissors, pencil, ruler, fine sandpaper, yellow glue, plastic cement, wax paper, sanding block, hobby knife, masking tape, primer (white), paint (white, silver) and clear coat (optional). (Tools, construction and finishing supplies not included.) WHAT YOU NEED TO LAUNCH (sold separately): Estes Porta-Pad E Launch Pad with a 3/16 inch launch rod and E Launch Controller, Estes model rocket engines, starters and recovery wadding. Four 1.5V AA alkaline batteries are also required for launch controller (not included).