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In pictures: BBC News website's 10th anniversary
Brainstorming

Fed up with batteries that run flat and gadgets that get battered with use, the children thought up new ways to power their inventions and materials to withstand wear and tear.

Working in pairs or threes, their concepts ranged from a paper-thin thought-activated news screen to artificial intelligence to deliver content tuned to its user's mood.

Aware that resources are finite, some opted for recyclable materials or dreamed up metals with self-repairing properties.

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