It was a small cube which seemed to be transparent, but only darkness could be seen inside. Nobody knew why. In bright sunshine, sheer darkness. No man wanted to touch it. Localized on a white stone-table in the park, everybody looked at it, but only from a certain distance.
Once upon an early morning a red-haired cockney boy came around and stared the cube wondering its peculiarity. He could be in his first school year, in fresh, dark-blue uniform. After a while three of his mates arrived when the boy shouted: „Go away, fools, this is something extraterrestrial!” And they ran away.
In the afternoon of the same day an old lady appeared in the shadow of the tree next to the stone-table. She looked at the cube, and was convinced, it was the stone of the wise.
Since then a lot of people have seen that cube but none of them touched it.
Make your bets, please: what could it be?