The following sites may help you .

The Beatles history:

http://news.bbc.co.uk/cbbcnews/hi/find_out/guides/showbiz/the_beatles/newsid_1684000/1684965.stm

http://www.beatles.com/

http://www.beatlesstory.com

The musical instruments:

http://www.si.umich.edu/chico/instrument/

http://paul.merton.ox.ac.uk/music/other-instrument-jokes.html