A new effort to provide care for the children of thousands of hospital staff and emergency responders in Colorado kicked off Monday with around 900 children linked up with nearby child care providers. The initiative covers a small slice of the tens of thousands of young children estimated to need care so their parents can work at essential jobs during the coronavirus pandemic, but leaders and participating child care providers say it represents an impressively fast response that will grow in the coming days. State officials and more than a dozen early childhood groups spearheaded the emergency child care campaign last week after a wave of school and child care center closures set off fears that health professionals and first responders wouldn’t be able to do their jobs without a safe place to send their children.