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Great Gizmos Kidz Labs Cartesian Diver

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£1.91 Best Offer by: amazon.co.uk marketplace See more offers

Brand: Great Gizmos

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  • Product Details

    Partially fill the diver with water, pop him inside a plastic drinks bottle full of water (not included) and screw down the cap. This simple submarine bobs just below the surface, but squeeze the bottle and he sinks to the bottom. It works due to changes in air pressure, and three 'weights' are provided so you can play at getting the diver to hook them from the bottom.