I just found this AWESOME piece of software online:
http://www.anykode.com/index.php
The program is called “Marilou” and lets you build, program and simulate pretty much anything. (haven't found a way to fly yet :P )
Best of all, FREE HOBBY LISENCE FOR ANYONE! (renew every 30 days.)
I have been playing with the thing for a few days, it’s pretty much the best thing I have ever seen for getting started.
(no, I don’t work for the company or stand to gain anything, just thought you guys might like to know :)
It also includes a bunch of samples, tutorials and online help.