If you want to find about basic building blocks of matter, the links here might be of help.
http://www2.slac.stanford.edu/vvc/theory/bldgblocks.html
http://www2.slac.stanford.edu/vvc/theory/quarks.html
http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html
http://hyperphysics.phy-astr.gsu.edu/hbase/particles/parcon.html
http://hyperphysics.phy-astr.gsu.edu/hbase/particles/quark.html
http://hyperphysics.phy-astr.gsu.edu/hbase/forces/funfor.html
The above link is from university web-sites. the one below is a link, but I dont know the scientific validity for the same.
http://home.hetnet.nl/~inthepicture/quarks/Page1.htm