Photographed every day for the past half a year by Manhattan artist Sally Davies the kids meal of fries and burger is without a hint of mould or decay.

In a work entitled The Happy Meal Project, Mrs Davies, 54, has charted the seemingly indestructible fast food meals progress as it refuses to yield to the forces of nature.Sitting on a shelf in her apartment, Sally has watched the Happy Meal with increasing shock and even her dogs have resisted the urge to try and steal a free tasty snack.

'I bought the meal on April 10 of this year and brought it home with the express intention of leaving it out to see how it fared,' she said.

'I chose McDonald's because it was nearest to my house, but the project could have been about any other of the myriad of fast food joints in New York.

'The first thing that struck me on day two of the experiment was that it no longer emitted any smell.

'And then the second point of note was that on the second day, my dogs stopped circling the shelf it was sitting on trying to see what was up there.'

Expecting the food to begin moulding after a few days, Mrs Davies' surprise turned to shock as the fries and burger still had not shown any signs of decomposition after two weeks.

'It was then that I realised that something strange might be going on with this food that I had bought,' she explained.

'The fries shrivelled slightly as did the burger patty, but the overall appearance of the food did not change as the weeks turned to months.

'And now, at six months old, the food is plastic to the touch and has an acrylic sheen to it.

'The only change that I can see is that it has become hard as a rock.'Even though she is a vegan, Mrs Davies' experiment has brought her amusement rather than fear.

'I don't really see this experiment as scary, I see it almost as an amusement,' she said.

'Although, I would be frightened at seeing this if I was a meat eater. Why hasn't even the bun become speckled with mould? It is odd.'

When asked if their food was not biodegradable, McDonald's spokeswoman Danya Proud said: 'This is nothing more than an outlandish claim and is completely false.'

It comes after Denver grandmother Joann Bruso left a Happy Meal to decay for a year until March to highlight the nutritional dangers of fast food.

Morgan Spurlock also made the film Super Size Me in 2004 charting the changes to his body eating just fast food for 28 days had.

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