Dad Stephen Crowley of Dublin, Ireland, is a skilled prankster. He loves to Photoshop his 18-month-old daughter, Hannah, into dangerous scenarios, then post those photos on Instagram.

"I thought it would be fun to worry family by putting someone delicate in precarious situations," he told HUH magazine. "Most of the reactions have been positive, with the odd person not getting the joke and commenting I 'should be shot.'"

According to Mashable, Hannah went through chemotherapy and had a bone marrow transplant to treat hemophagocytic lymphohistiocytosis, or HLH. Crowley is now trying to raise awareness about donating bone marrow. Learn more here.

– The Cox Media Group National Content Desk contributed to this report.