MIKE: OK, this one is called ‘Spinning colourwheel’. It looks like you get some cardboard anddraw a circle on it, divide it into six equal segmentsand colour each one in using different colours, thenyou thread a piece of string through the middle.
SUE: So we’d need some string as well.
MIKE: Yes, sorry …um …and you spin the wheelaround and if you can get it spinning fast enough,hopefully the colours all merge and show up aswhite.
SUE: Oh, I didn’t know that. What’s the principlebehind it?
MIKE: Well it’s pretty elementary physics, really. It teaches them about how white light orordinary light is made up.
SUE: Hmm, well that doesn’t sound too bad. Now there’s only one more left in this book isn'tthere? What does that one say?
MIKE: Um, well it’s another one where they'd get to make something.
SUE: Sounds very interesting.
MIKE: You need quite a lot of equipment actually - a hand drill, an old record, a pin or needle,some paper and a bolt.
SUE: Hmm, go on, what do they have to do?
MIKE: Well, they basically make a record player. The main idea is to teach them aboutrecording sound, but hopefully they’d also see that you need motion and an amplifier tomake the sound heard.
SUE: OK, well it does sound interesting. Shall we go through all of those again and decide if anyof them are going to be suitable?