Science:

Weather:

http://asd-www.larc.nasa.gov/SCOOL/tutorial/clouds/cloudtypes.html

http://eo.ucar.edu/kids/dangerwx/hurricane3.htm

http://www.hurricane.com/hurricane-names.php

http://www.yvw.com.au/waterschool/juniors/water_comes.html#

http://ga.water.usgs.gov/edu/followadrip.html

http://oncampus.richmond.edu/academics/education/projects/webunits/water/watercycle.html

http://www.bom.gov.au/lam/Students_Teachers/animations/cloudzstart.shtml

http://www.windows.ucar.edu/cgi-bin/tour_def/earth/Atmosphere/clouds/cloud_types.html

http://oncampus.richmond.edu/academics/education/projects/webunits/weather/

http://www.on.ec.gc.ca/skywatchers/index_e.html

http://www.theweathernetwork.com/

http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/af/frnts/home.rxml

http://library.thinkquest.org/15325/

http://www.wxdude.com/

http://www.mspollocksclass.com/grade5weather.html

http://www.miamisci.org/hurricane/insideahurricane.html

http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/cld/home.rxml

http://www.pnr-rpn.ec.gc.ca/air/wintersevere/weatherwords.en.html

http://www.blackgold.ab.ca/ict/Divison2/science5/topic_d.htm

http://apps.southeastwater.com.au/games/education_kidsroom_wcactivity.asp 

http://kids.earth.nasa.gov/droplet.html

http://www.epa.gov/safewater/kids/flash/flash_watercycle.html

Forces and Simple Machines:

http://www.cape.k12.mo.us/blanchard/hicks/news%20Pages/scienceforce.htm#Friction

http://www.mhs2.go.th/sono/UNESCO/contents/science/secondary/Physics/Forces.ppt

http://www.edheads.org/activities/odd_machine/

http://www.edheads.org/activities/simple-machines/index.htm

http://physics.about.com/od/physicsintherealworld/p/simplemachines.htm

http://www-bioc.rice.edu/precollege/k12resources/Force%20and%20Motion%20Websites.htm

http://www.bbc.co.uk/schools/scienceclips/ages/6_7/forces_movement.shtml

http://www.firstschoolyears.com/science/forces/forces.html

http://www.ngfl-cymru.org.uk/vtc/push_pull/eng/Introduction/default.htm

http://www.ngfl-cymru.org.uk/vtc/identify_forces/eng/Introduction/default.htm

http://www.wonderville.ca/v1/activities/strongman/strongman.html

http://www.walter-fendt.de/ph11e/pulleysystem.htm

http://edheads.org/activities/simple-machines/