Both the Computing curriculum (mandatory in LA funded schools since 1st September 2014) and the technology curriculum require pupils to engage in what is sometimes called 'physical computing'. 'Physical computing' is when we create a programme on a computer that controls an external device - older readers may remember running Flowol on a pc to control the lights of a cardboard cut out lighthouse.
Most KS2 pupils (and their teachers) have experienced using Scratch to create a program that moves the ‘sprite’ around the screen. They will have debugged their programmes (found and fixed errors). Most will have used repetition (the repeat block), sequence (lots of instructions in a particular order) and selection (use of the ‘if’ block). The use of electrical components in the Technology Curriculum was a part of the previous science curriculum so hopefully everyone is fairly up to speed with placing a battery, bulb, switch circuit inside a cardboard tube with a bit of coloured film over one end to make a torch.