Even as the economy forces some organizations to cut benefits, it’s prompting others to add one: allowing parents to bring their babies to work. In just two years, the number of organizations with a babies-at-work benefit has more than doubled to 130, says Carla Moquin, founder and president of the Parenting in the Workplace Institute. She advises managers to start small and to create a formal policy full of “safety valves.” Here are 10 keys to success: