http://mrnussbaum.com/science/   http://spaceplace.nasa.gov/ https://www.khanacademy.org/
 http://www.kidsastronomy.com/http://www.factmonster.com/science.html   http://www.knowitall.org/hobbyShop/siteAgentMain.html
 http://nationalzoo.si.edu/default.cfm http://starchild.gsfc.nasa.gov/docs/StarChild/StarChild.html 
 http://www.turtlediary.com/kids-games/science.html http://www.sheppardsoftware.com/science.htmhttp://www.pitara.com/category/science-for-kids/