Make your iPhone go where no iPhone has gone before. Mike Westerfield has put together a project on Make showing you how to design an iPhone carrying rocket too send your phone to new heights. In addition, he created an iOS program in techBASIC to record flight data.
It’s definitely complex, but this would be a cool project to work on over the summer, especially if you’re into science and rockets. However I would say that while Westerfield did it using his wife’s iPhone, I reckon you’d be better using your own or you might end up on the couch.
For the full instructions and parts required, check out the page on Make.