Visit Sporcle to play chemistry games! Some of the most useful ones so far:
Read about the "Blue Fugates"
In class, I mentioned the blue people of Kentucky (specifically the Blue Fugates) and received many requests for further information. For the story, read Cathy Trost's article on the family, published in Science Magazine in 1982. For information on the disorder (known as methemoglobinemia), Wikipedia has a nice article describing it. Unfortunately, there don't seem to be any real pictures of the family members online, but if you do a Google image search for "blue Fugates", you will find a painting of an early generation of the family (in which four of the seven children were blue) and several pictures of people who are currently alive and blue (but not due to this disorder; these people have treated themselves with colloidal silver, which will turn you permanently blue if ingested).
Whether you enjoy tongue-twisters or simply enjoy thinking about the (common lack of) connection between spelling and pronunciation in English, this piece will be sure to intrigue you.