Hours of fun with the Lego Mars Mission Command Base! Your Lego lover can defend the Mars base from alien attack with air-powered missiles, then turn the air pump to transfer captured aliens and energy crystals through the base?s tubes. Launch the high-tech shuttle to battle the alien ship! Complete base set includes alien transport pods, alien attack ship, futuristic space shuttle and air pump system! Includes four foam missiles that are safe for play! Includes four astronaut minifigures and four glow-in-the-dark alien minifigures! This is one Lego set that won't end up in the big bin!