Don`t worry we can make a sail., I`m sorry everyone., Good ideas! You get a stick for a mast. I can get some fabric for the sail., Why isn`t it moving?, Yes, I`ve got our boat here., Ravi is brilliant at making machines., I think we are going to win., Let`s use solar power., We can make a battery out of lemons., We need some coins, sopme paperclips and some wires, too., It is working., Look. The lemons are joined together with wire., The children win the race., The battery is made of oranges..

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