How to answer a child's why question when you have no idea

The reply that ends it

"Because that's how it is" and "ask your teacher" both close the door. So, more subtly, does reading out a perfect answer from your phone. The question is answered, and the child learns that questions go to machines. There is nothing wrong with looking things up. It is just best done second.

Four replies that keep it open

"What do you think?"

Say it with real interest, and wait longer than feels comfortable. A wrong theory from a seven-year-old tells you exactly how they picture the world.

"How could we find out?"

This one changes the game. Why does ice float? "Let's see if it floats in oil too." You have moved from answer-giving to investigating, and you did not need to know anything.

"I don't know. Let's write it down."

Keep a list on the fridge. Pull one out at the weekend. It shows that not knowing is a normal, comfortable state, which is perhaps the most useful thing a parent can model.

"Here's the bit I do know."

Give what you have and mark its edge: "Cats purr when they're relaxed, I think, but I've no idea how they make the sound." Children rarely hear adults admit where their knowledge stops.

When you do look it up, look it up together

Search side by side and read two sources. If you use an AI, say out loud that it can be wrong, and check one claim. That is a small lesson in evidence, delivered at bedtime.

If you are tired, which you are

You will not manage this every time, and nobody does. One honest "let's find out" a week is plenty.

When a question can be tested, Taz's 3D labs let you try it on screen after bedtime debates. We build Taz, so factor that in. A bowl of water usually works just as well.