Here are some sites and tutorials to help:
http://www.wikihow.com/Make-Animation-or-Movies-with-Microsoft-PowerPoint
http://www.howtogeek.com/howto/19105/how-to-animate-text-and-objects-in-powerpoint-2010/
http://it.usu.edu/plugins/work/sitemaps/47/files/PowerPoint_animation.pdf
http://office.microsoft.com/en-us/powerpoint-help/animate-text-or-objects-HA010021497.aspx
http://www.techrepublic.com/blog/five-apps/five-tips-for-creating-animations-in-powerpoint-2010/316