Balloon birds

There’s some science here (air pressure and propulsion) but it’s fun!

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You will need a balloon, string, a straw (preferably a fat one!), sellotape, a peg and ribbons and paper to decorate

Cut a 3cm length of straw and around a metre of string

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Thread the straw onto the string

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Blow up you balloon and hold it closed with the peg

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Decorate the balloon to look like a bird

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Stick the straw (the bit you threaded onto the string) onto the top of your balloon. It works best if you stick it to the back third of the balloon

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Tied one end of the string to a chair (or similar!) and hold the other end tightly

Pull the balloon bird to one end

 

Gently let the peg loose and the balloon bird will fly along!

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