Foreign Office advice has urged people not to travel to Ukraine while the country is in conflict with Russia.
Mr Draper said the family, who live in Gunnislake in Cornwall, had tried to convince his son not to travel out to Ukraine, but they understood it was something he was passionate about doing because he wanted to help.
"We begged and begged and begged him not to go," Mr Draper said.
"But Callum said 'dad, I'm not frightened of bullies and what's going on in Ukraine is awful and someone needs to stand up for these people'."