Weird and wacky: Inventors show off their devices

French Jean Marc Batard presents his invention a vertical garden which allows elderly people to garden. It can also be used by people who love gardening but cannot bend down at the 39th International Exhibition of Inventions, New Techniques and Products, in Geneva, Switzerland, Wednesday, April 6, 2011. 765 exhibitors from 45 countries are presenting around 1000 products at the 39th International Exhibition of Inventions, which runs from April 6-10.

They say there's a gadget for just about everything. That now includes boots which detect radiation and a kangaroo tail for weary humans who'd like a rest but can't be bothered to sit down.

These and a thousand other devices went on display Wednesday at the world's biggest inventions fair, where exhibitors from 45 countries showed off their weird and wacky designs in Geneva in the hope of attracting investors or buyers.

Peyman Sarhadi of Iran showed off his "super smart boot," which he hopes will become the Swiss army knife of footwear.

Equipped with sensors, it collects data on air temperature, humidity, location and the wearer's blood pressure, and then sends the information to a base camp. It can heat or cool the feet and can also measure radiation levels, a feat that might be useful given Iran's reputed nuclear ambitions - peaceful or otherwise.

Sarhadi claims the boot is already being tested by the Iranian army.

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