I think this is a great way to get your kids to have a habit of self-learning. In my opinions, this is the single most important skill a kid can learn.
Every time my little cousins ask me something they want to learn, I go with "Let's search for the answer together" and guide them on how to do basic research. Sometimes I ask them follow-up questions if they find the topic interesting so it gives them a sense of accomplishment. Takes little time and effort but teaches the most valuable skill.