We found these websites to have very good animations of plant cell processes and basic cell structure. Click the links below to check them out!
http://vcell.ndsu.nodak.edu/animations/
http://video.google.com/videoplay?docid=-3071319216832324957&ei=u4HZSJ3BCZycrAK-x4S5Ag&q=plant+cell&vt=lf&hl=en
