Lego Space Space subtheme in which the entire theme is "good", "bad", or "civilian". Life on Mars is a space theme released in 2001, around a time of increased curiosity about the red planet. The theme revolved around the concept of the lifeforms that could possibly exist on Mars. This was the first Space theme to feature two types of minifigures: human astronauts and Martian aliens. The sets denote peaceful coexistence between the two species on the planet Mars. The "Life on Mars" theme pioneered several unique aspects in Lego in general. It was the first Lego theme to utilize a pneumatic
Dora the Explorer: Journey to the Purple Planet a level. When Dora and Boots are looking up at outer space, a flying saucer containing five aliens (“Flinky”, “Inky”, “Plinky”, “Dinky” and “Al”) from the purple planet, lands on Earth. However, the saucer falls apart and Dora and Boots have to get the aliens back to the Purple Planet. Isa has a rocket ship that Dora and Boots can borrow, which is located on top of the tall mountain. To get there, Dora and Boots first need to cross the Turtle River, then get past the Icky Sticky Sand, then swing over Crocodile Lake and finally climb up to