I would recommend "The Number Devil" [1] for children (from 11 on) and adults alike.
It's a zany story, but in that respect it provides a refreshing intro into some math concepts.
In that vein, I also recommend "mathematical mindsets" [2]. A colleague developed a course inspired by this book. Though I only witnessed a tidbit, it radiated with the "new perspective/ new insights / gained understanding" that you'd get from the Feynman lectures.
Sidenote: neither is "now you know how all of maths work", but neither is Feynman thaf (foot physics). More importantly, all of them help you gain a new perspective on things.
It's a zany story, but in that respect it provides a refreshing intro into some math concepts.
In that vein, I also recommend "mathematical mindsets" [2]. A colleague developed a course inspired by this book. Though I only witnessed a tidbit, it radiated with the "new perspective/ new insights / gained understanding" that you'd get from the Feynman lectures.
Sidenote: neither is "now you know how all of maths work", but neither is Feynman thaf (foot physics). More importantly, all of them help you gain a new perspective on things.
[1] eg. https://www.bol.com/nl/p/the-number-devil-a-mathematical-adv...
[2] eg. https://books.google.nl/books/about/Mathematical_Mindsets.ht...