This site is great, it has these slices of everyday objects and breaks them out into their technical terms and names.  This is great when you are looking up something at say a hardware store and need to find the do-hickie that you jiggle to make the toilet stop running.  It has a great Ajax search agent to help you find exactly what you want quickly and easily.  And as the name indicates it gives you a definition of each of the parts along with a little audible clip you can play to hear the word.