A Mark Rothko painting thought to be worth tens of millions of dollars is undergoing restoration after a child accidentally ...

The child, who hasn’t been identified, managed to deface the American painter’s 1960 abstract artwork during a visit to the Boijmans Van Beuningen museum in Rotterdam.

That's arguably the moral of the story after a child reportedly damaged a Mark Rothko painting worth a whopping $56 million.

Literally marked by a child’s hand, one of the Netherlands' most valuable paintings is now undergoing restoration after being accidentally damaged in a Rotterdam museum.