Israeli metal artist Yaron Bob makes roses and other art items out of spent steel artillery and rockets fired from Gaza by Hamas into Israel.
He made his first rose a few years ago as his personal answer to the violence and destruction and wanted to create a symbol of peace out of the weapons.
He's in the city this week as part of "Radical Resilience Week Hong Kong", a series of community events with international and local speakers focusing on education, arts, innovation and human potential leading up to the TEDx Happy Valley day next Saturday.
But Bob is also here to create a memorial with schoolchildren to a former vice-principal of King George V School.
"After I made the first rose I felt so good," says Bob, 41, who admits to being "crazy" about the flowers but says he doesn't care about politics. "I felt so satisfied. It was an amazing feeling. For my own heart - taking all the negative energy that I have and making it into something good."
Initially the roses went to family and friends, but were then used to raise money for bomb shelters for the inhabitants of his hometown of Moshav Yated in Eshkol region.
But artwork he sells this week in Hong Kong at an event "In Conversation with Yaron Bob" on Monday evening and next Saturday will go towards entertainment facilities for children suffering with cancer at the oncology ward in Israel's Soroka Hospital.
Bob, a divorced father of two, who works in computers and as a part-time teacher, will also be working this week with schoolchildren on The KGV Memorial Project to remember vice-principal Tim Ford, who committed suicide last year.
"It's an amazing honour," he said. "We have been sitting together through Skype and making sketches for the memorial."
Bob also has fun with schoolchildren in his local town by bending forks. But does he do it in the same way as world-famous spoon bending by psychic and fellow Israeli Uri Geller?
"No, he used mind control," said Bob. "I use a pair of pliers."