"I call it reconciliation," says Manuel Elviro. He is part of a Spanish volunteer group that felt compelled to act after seeing some of the dramatic drawings by children who survived the perilous sea crossing from Turkey to Greece.
The volunteers' task was to try to entice traumatised children on the island of Lesbos back into the sea to help them tackle their fears. As well as the terror of the crossing, the children had depicted the war zones they had fled and the filth of the refugee camps, rife with violence and sexual abuse.
"Worst of all, they drew hopelessness," recalls Mr Elviro, a technology researcher from Spain's Balearic Islands University who volunteered for charity Proem-aid.
"As I am from Mallorca, a Mediterranean man, I love my sea. It was like an affront. We had to do something."