Why don't you do a Google search on bongs, so you know what one looks like, because it sounds like you've never even seen one before, andf once you do see one, it takes about 2 brain cells to figure out how it works. Fuck it, click on this link down below:

http://images.google.ca/images?q=bon...r=&sa=N&tab=wi

Now that you know what a bong looks like, figure out how to make one. Good luck.