If you are a science lover, and more specifically of electronics, then you`ll love this Circuit Construction Kit. It is a simulator to build all types of electric circuits in your PC, and thus be able to try out and experiment as you like.
In the circuits you create with Circuit Construction Kit you can add resistors, lights, batteries and switches, combining them as you like, and creating a diagram that simulates the working of a real circuit.
For Circuit Construction Kit to work correctly, you need to previously install Java Virtual Machine.