multiplicationanimations.com
All of the animations, backgrounds, and sounds used to make
multiplicationanimations.com came from these free websites.  

http://www.animationlibrary.com/

http://www.gifanimations.com/

http://www.bestanimations.com/

http://www.partnersinrhyme.com/pir/PIRsfx.shtml

http://www.backgroundlabs.com/nature-backgrounds/page-2.h
tml

http://www.freebackgrounds.com/plaza.htm

http://www.allfreebackgrounds.com/background_select.html

http://www.grsites.com/archive/textures/category/28/textur
e/48

http://www.fg-a.com/backgrounds3.htm

http://www.backgrounds.free-animations.co.uk/nature/backgr
ound_2.html

http://www.aaabackgrounds.com/textures/green/page5.htm