Please refer to http://www.bigbangcannons.com/default.aspx and http://en.wikipedia.org/wiki/Calcium_carbidefor more information.
Please refer to http://sci-toys.com/scitoys/scitoys/thermo/thermo2.html.
Please refer to http://en.wikipedia.org/wiki/Spud_gun and http://www.backyard-ballistics.com/ for more information.
Based on the book Backyard Ballistics by William Gurstelle. ISBN: 1556523750.
Please refer to http://scitoys.com/scitoys/scitoys/magnets/gauss.html for more information.