Images From Space:
http://hubblesite.org/
http://www.earthfromspace.si.edu/online_exhibition.asp
http://photojournal.jpl.nasa.gov/index.html
http://earthobservatory.nasa.gov/

Websites for Research:
Windows to the Universe
http://www.windows.ucar.edu/

National Air and Space Museum: Exploring the Planets
http://www.nasm.si.edu/etp/

NASA: StarChild: A Learning Center for Young Astronomers
http://starchild.gsfc.nasa.gov/docs/StarChild/StarChild.html

NASA: All About the Planets
http://solarsystem.nasa.gov/planets/profile.cfm?Object=SolarSys&Display=Kids

More NASA Kid Pages
http://solarsystem.nasa.gov/kids/nasakids.cfm

Kids Astronomy.com
http://www.kidsastronomy.com/

Cycles in Nature: information about day and night, seasonal changes, phases of the moon, and the tides
http://oncampus.richmond.edu/academics/education/projects/webunits/cycles/index.html