Science - Magnets and Springs
Have a look at the BBC website to find out more about Magnets and Springs.
Click on the link below :
http://www.bbc.co.uk/schools/ks2bitesize/science/activities/magnets_springs.shtml
You could also try this site for another exciting experience :
http://www.engineeringinteract.org/resources/parkworldplot/parkworldplotlink.htm