Exomars Rover
Robotic missions to mars will offer a deeper understanding of mars's environment, pave the way for manned missions and contribute to their success.
http://www.esa.int/SPECIALS/Aurora/SEMXIRWO4HD_0.html
Simple Model
Young engineers of all levels can build a paper model of the cassini spacecraft.
http://saturn.jpl.nasa.gov/kids/activities-model-simple.cfm
Space Shuttle
Space Shuttle
http://papertoys.com/shuttle.htm