Write a little bit of Scheme to fly up beyond the edge of the (xkcd) universe.  goo.gl/k7gcRE

For non-programmers: If you just run it, the rocket won't go anywhere.  You have to start programming.  But the EXAMPLEs should help: the definition will look very similar, but you'll use the name, seconds, instead of the numbers that change between the EXAMPLEs.  Try it! 

This is part of Lesson 4 in an introduction to programming and algebra for middle school kids at http://bootstrapworld.org/

The project could seriously use your help.  Please contribute by programming in http://github.com/bootstrapworld or https://github.com/dyoo/WeScheme, by volunteering to teach kids yourself, or with your financial support.
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