This site offers an interactive introduction to electric circuits covering the basics of circuits and leading up to conductors, insulators, switches, and circuit diagrams. Easy to use with bright colors, The Blobz Guide to Electric Circuits presents the perfect introduction to circuits for the elementary student. Students follow Bob and the other Blobz through five lessons on circuits. Each lesson begins with background information, moves to an activity using drag and drop, and then ends with a quiz.
There is no better way of learning about circuits than to get out the wires and play. But this is a good resource that helps you teach about circuits and how to build them. Good as an introduction to the topic.
http://ictmagic.wikispaces.com/Science
"Superb adventure platform and puzzle game which teaches about electricity and electrical circuits, designed by the engineering department at the University of Cambridge. Play in your browser or download from Steam."