[icc97]

Yes, it's notable that Brent's son first was interested enough to ask him and then stayed interested as he explained.

You can't start telling your child about maths if they're busy doing something else. All you can do is wait for a moment when their curiosity spots something and try to feed that.

Even when you catch their interest it's easy to break it if you can't explain it, so los of kudos to Brent for navigating it perfectly.