Reddit mentions of Fun with Maths and Physics

Here are the two I loved reading around the age of 10:

https://www.amazon.com/Mathematics-Can-Be-Fun-Perelman/dp/0828531714/ref=sr_1_2?keywords=Mathematics+Can+Be+Fun&qid=1568304872&s=books&sr=1-2

https://www.amazon.com/Fun-Maths-Physics-Yakov-Perelman/dp/2917260319/ref=pd_cp_14_2?pd_rd_w=w0d3g&pf_rd_p=ef4dc990-a9ca-4945-ae0b-f8d549198ed6&pf_rd_r=KT2SQ9RRW7JX5ZHZVD3N&pd_rd_r=8570a2f1-d81b-4d50-b534-e14872c3ce49&pd_rd_wg=Xaguj&pd_rd_i=2917260319&psc=1&refRID=KT2SQ9RRW7JX5ZHZVD3N

Despite what I just said, don't be deceived: these books feature very thought-provoking puzzles and mental experiments. They may be on an easier side, but everyone can learn something new from them and look at the old things from a different perspective.

I would argue that these books were the reason I became interested in mathematics in the first place. There is something about how they are written that just picks at the core of your curiosity and pulls you into the world of logic and intuition.