The Howard Hughes Medical Institute offers a very nice selection of free biological science and health educational DVDs. These are free to order and include topics from evolution to the science of fat. Don't pass up ordering these great free DVDs to educate yourself and your children on some of the cutting edge work being done today. You can order up to 3 copies of each DVD so that you can also give copies to your school and/or library. They even ship it through UPS for free.