Welcome to the physics area.
If the cold nights make you wish for a good book to read then look no further than Richard Feynman's QED.
This is a short, easy-to-read paperback book all about Quantum Electro-Dynamics.
The name sounds a bit scary but the book should be accessible to keen KS4 students who want to find out more about how (and why) light interacts with matter.
It's also the ideal book for anybody who has ever wondered why you can see through glass and also see reflections on the surface of glass at the same time.
If you prefer your stimulation online then try the Bristol Science Centre's Science in a Different Light website (www.scienceinadifferentlight.org) - embedded below.