I've seen a lot of people going like... why remember stuff when you can easily google it? But it doesn't work that way. The more facts reside in your brain, the more avenues it has to connect them together and generate insights (after all, that thing is the OG "neural network").
I highly admire your parenting in this aspect, and I hope to do the same when I have kids of my own.
Edit: I noticed after publishing my comment that you're Derek Sivers! I've been a long time reader of your blog :)