The Golden Egg

It's Easter on Devil's Leap and after having spent an entire day painting eggs, in all variety of shapes and colours, the hunt is on. However, the children find a little more than they had bargained for, when it is discovered that one of the eggs they found is made entirely out of gold.
What secret does this mysterious golden egg contain? What does this have to do with Lord Darvil and a rather peculiar truck that visited the farm nearly a century earlier? Find out what the children discover when they investigate the mystery of the golden egg.