How does light and sound travel?

This week we were investigating how light and sound travels. We discovered that light travels in a straight line, where as sound is a vibration/wave.
We had lots of fun experimenting with torches and tuning forks. We even an made our own discovery that you can feel your own sound vibrations if you hold your hand to your windpipe.
                                    
After discovering that light only travels in a straight line we asked if it is possible to make that line change direction? After exploring with different materials we discovered that it is possible to bounce light of smooth shiny materials - mirrors and cd’s work the best. We had a lot of fun up in the peace garden trying to get the sunlight to bounce.