Kindergarten
http://pbskids.org/catinthehat/games/
weather-transformer.html
Join the Cat in the Hat and his friends. Drag and drop them into the yard and then click one of the weather buttons to change the weather. See what happens!
Grade 1
http://www.wonderville.ca/asset/forces-of-wonder
"Witness the wonder of physical forces and challenge the might and power of the world's strongest man, the amazing Stronginsky!"
Grade 2

http://www.eduplace.com/kids/hmsc/
activities/simulations/gr1/unite.html
texListen and learn about why things sink or float. In part 2, you can click on objects to see if they sink or float in water.
Grade 3

http://www.eduplace.com/kids/hmsc/
activities/simulations/gr4/unita.html
How do bats use sound to find insects and avoid objects in the dark? In part two, you will learn how bats use echolocation to hunt and navigate around obstacles; after the demonstration, you will use echolocation to help the bat feed and steer through the air.
Grade 4

http://www.wonderville.ca/asset/medieval-levers
This Wonderville interactive helps you learn all about the medieval lever. How did people use levers during medieval battles?
Grade 5
http://www.bbc.co.uk/schools/ks2bitesize/
science/materials/reversible_irreversible_changes/
play.shtml
Explore what happens as you change materials in this interactive activity.
Grade 6

http://www.history.com/shows/the-universe/interactives/interactive-universe
Enjoy this virtual journey through space as you explore the planets in our galaxy, as well as distant galaxies, asteroids and dying stars.