Baby Willow has other issues, including vision problems.
Her illness often causes isolation because the family fears germs can make her sick.
"We were trying to be upbeat, see the positive side but after you get hit so many times it's really, really hard," says mother, Kelly Caruso.
Kelly says, "this backyard was so important to let them be kids, have fun and since it's been completed they haven't stopped playing."
The company, All Terrain Landscape Creations held a backyard makeover contest and they chose the Caruso's. They started working on the backyard in September after the hot Southern Arizona summer.
The company planted a Desert willow tree and Olive tree for the sisters.
"This gives them a fresh opportunity to have the children enjoy the yard and the family to enjoy as well. That's ultimately all terrains goal to provide smiles," says president of All Terrain Landscape Creations, David Ormsby.