This Castle photo contains
bellbottom trousers, bell bottoms, bellbottom pants, and pantleg.
There might also be
long trousers, long pants, flannel, gabardine, tweed, white, pant leg, and trouser leg.
Just a quick video - not sure whether to do the full song (its only 1:20 or so) but I thought it fit quite well considering its actually fom a kids program :-)