Wednesday, November 18, 2009

How do we clean these old moneys, Mum?

A few weeks ago, our wonderful neighbour, Pete, gave Phoebe a collection of his old coins from various travels...interesting...And then on Sunday Phoebe bagan examining them, sorting them, spreading them out, looking at the pretty designs, only they were all covered with...verdis gris and general 'gunk'. So, what to do? Mummy, how do we clean these "moneys"? has now led to our first Science Experiment...Cleaning Coins.We decided on a mixture of Baking Soda and White Vinegar, which we know is good at cleaning all sorts of dirt off all sorts of surfaces. Then, we had a visit from Uncle Ray - he's a geologist and knows plenty about Science! He and Aunty Raema suggested coca-cola and orange juice. And then we considered milk as an alkali liquid to see what might happen with that and then as with all science experiments, you really need to have that thing called a control - so we chose water.

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