This cool Clickable Spacesuit interactive from NASA was shared by Kelly Tenkely on iLearn Technology and I wanted to mention it here too. (PS you should definitely be following Kelly’s blog if you are interested in integrating technology in an elementary classroom- tons of excellent resources.)
The interactive could be used as part of a lesson on technology, design, or systems.
You may also be interested in Kelly’s list of 33 Space Websites to Celebrate the Launch of Endeavour
Science for All 