• Basic Electricity (easier)
    http://www.bbc.co.uk/schools/scienceclips/ages/6_7/electricity.shtml
     
     
    Circuits & Conductors (medium)
    http://www.bbc.co.uk/schools/scienceclips/ages/8_9/circuits_conductors.shtml
     
     
    Changing Circuits (harder)
    http://www.bbc.co.uk/schools/scienceclips/ages/10_11/changing_circuits.shtml