Isaac Kimball, 2, focuses as he pours sand into a heart-shaped jar at Life Center Foursquare Church in Spokane. His father, Paul Kimball, holds his oldest boy, a huge grin on his face. A little over a year ago, Isaac was the Kimballs’ only child. Now, thanks to the state’s foster care system and Washington-based Antioch Adoptions, the Kimballs have gone from a family of three to a family of five with one on the way.