The training drill brought smiles and a flood of emotions for Sandy Springs firefighters and their tiny fans.
The rappelling exercise at Children's Healthcare of Atlanta will be a fond memory for many.
"Not everyone wants someone in the room with the kids, so it was a cool way of them getting to be close to us without us having to go in their rooms," Capt. Kyle Sweeney told FOX5.
He said crews formed an instant bond as they saw the children's eyes light up. There were fist bumps and high-fives through the glass.
"It really brightened his day," said Zach Lansdell, whose son Levi has been in the hospital for 200 days.
"It really made a huge impact on Levi and was a huge morale booster," said Zach, adding that it was one of his three-year-old son's best days.
Lt. Chris Mileshko was among the firefighters. His father's video company, Mileshko.com, took some unforgettable photos of video of the special day.
After their high-angle introduction, the firefighters went inside to visit. But, it didn't end there.
Some have developed friendships with parents and have gone back to spend time.