It's worth visiting Steve Spangler's website and buying the materials from there. He has also videos and you tube clips of the best way to do these and lots of other simple but imaginative experiments.
We did this with diet coke and 'mentos' lidl brand.
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From: psci-com: on public engagement with science on behalf of colin murphy
Sent: Sat 04/07/2009 11:29
To: [log in to unmask]
Subject: Re: [PSCI-COM] Explosion help!
People suggest using diet coke for really good results.
Colin Murphy
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On 4 Jul 2009, at 10:41, Gemma Hebden wrote:
I have just performed the diet coke and mentos experiment with children at a local school and they loved it. It can go wrong though, so I recommend buying a Geyser Tube, which holds the mints (x7) in the plastic tube until you pull out the stopper. It means you can leg it out the way before the coke explodes, but the tube forces the liquid up very high. Ours reached about 7 feet, much the the delight of the screaming children (along with the soaking their poor teacher got). I also recommend buying Coca Cola because the cheap brand I practised with was a big disappointment, but I'm guessing this is because Coca Cola has much more fizz, so perhaps Pepsi would work equally as well.
I found the Geyser Tube in a shop called Hawkin's Bazaar for £5.99 but I suspect you can find them cheaper online. You can create a DIY kit with a smarties tube and a small piece of cardboard, but you forgo the plastic tube for the liquid to rush through. I've not personally tried this version, but better than nothing if you have time/money constraints.
________________________________
Date: Fri, 3 Jul 2009 13:25:55 +0000
From: [log in to unmask]
Subject: [PSCI-COM] Explosion help!
To: [log in to unmask]
Hello,
Does anyone know any safe but impressive explosions a child can make with household products? So far I have tried the following:
1. vinegar and baking powder
2. toilet cleaner and aluminium 'bomb'
3. hydrogen peroxide and yeast 'elephant toothpaste'
None have worked incredibly well. They just foam a little out of the measuring cylinder. The toilet cleaner and aluminium barely worked at all. Even after a whole night of the aluminium balls sitting in the toilet cleaner, it didn't go off!
Please help!
Thanks
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