What's the "BIG IDEA" the Motion of Objects

How do things move? How do magnets work? Is there a difference between a hard push and a soft push?

I teach first grade science and I found the following web sites to be educational and motivational;

 Listen and Interact with this BBC site, Hard Push vs. Soft Push:                                  http://www.bbc.co.uk/schools/scienceclips/ages/5_6/pushes_pulls_whatnext.shtml

An engaging site about the movement of objects:

   http://www.primaryscience.ie/activities_activity_movies.php (The Starting & Stopping Movie)

Learn about forces;

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

Interactive, almost to a fault, looks great though (w/teacher guidance):

  http://www.moovl.co.uk/ (free 1 month trial) Looks great!