Gęba

If you click on any of the  links given below, they will direct you to some amazing exercises on articulatory phonetics (gębas in particular):

http://www.uiowa.edu/~acadtech/phonetics/#

http://www.uiowa.edu/~acadtech/phonetics/anatomy.htm

http://davidbrett.uniss.it/phonology/curvy%20lines%20phonemes/phonemesMatch%20Pics.html

http://homes.chass.utoronto.ca/~danhall/phonetics/sammy.html 

http://www.youtube.com/watch?v=uTOhDqhCKQs

Have fun :)