Do people really ask if angels have belly buttons? Yes! This is a question I am asked frequently by adults—my wife’s obstetrician did. I have never had a child ask this question. People who ask (besides the ones who are trying to be cute) are those who know an important fact about angels. Angels are not born. They are created directly by God, so angels have no need for an umbilical cord, and there is no reason for them to have a belly button.
More importantly, angels are spirits (Hebrews 1:14). They remain unseen to our eyes. They don’t have bodies, let alone belly buttons. In the Bible, angels take on a physical form only when it is necessary for them to be seen. When angels do appear as people they are always modestly clothed. How detailed is their anatomy beneath their clothes? Do they choose to have a belly button in this temporary appearance? We cannot know. You can ask when you get to heaven, but I doubt you will think it is important to know then.