If you’re a young parent, you’re probably used to hearing “Why?” a lot! With that in mind, a new survey finds moms and dads field an average of 11 questions from their young children each day.

A new poll of 2,000 parents of kids under six finds that between being asked “What?” (37%), “When?” (22%), and “Why?” (11%), parents are always on call when their kids get curious.

Children most commonly ask questions to better understand the world around them, such as asking about animals, nature, current events, and home experiences. When asked about the most interesting question their child has ever asked, parents mentioned “Why is the sky so high?” and “Why can fish keep their eyes open in water?”

Children’s questions may be frequent, but they aren’t always easy, as parents admit they can confidently answer an average of only 42% of their child’s questions. Poll results also reveal that 81% of parents learn just as much from their child as their child learns from them. The average parent learns something new from their child about five times per week, and four in five parents are surprised by their child’s knowledge of certain topics.