By Diane Bartz WASHINGTON (Reuters) – Google Inc has agreed to refund at least $19 million to parents who were unfairly billed for charges racked up by children playing video games such as Ice Age Village and Air Penguins on smartphones and tablets. Children sometimes put hundreds of dollars on their parents credit cards without permission and thousands of complaints were made, the U.S. Federal Trade Commission said on Thursday in announcing the settlement. The agreement was similar to a $32.5 million settlement reached with Apple Inc in January.