Ask HN: Cool math-topics for small children?

For some time I am pondering to start something like a math-club for my daughter and her friends, in the spirit of Zvonkin's Math from 3 to 7 [1]

Thing is, creating math-puzzles is hard work so I'd like to know if some of you have resources you'd use :)

My 5 year old seems to like when I discuss math with her, but when I was looking at my local library, I mostly found materials either for older kids (ie. teaching them to solve systems of linear equations with word puzzles after they already know addition and multiplication) or these were really focus on the drill of counting numbers, and that seemed boring. The best book I so far found in a bookshop was Bedtime Math [3], because it at least has interesting trivia ccompanying the word problems, and some are appropriate for a pre-schooler. But it still is mostly counting.

We both liked the story of exponential (factorial?) growth in Anno's mysterious multiplying jar [2] (damn, I have to comb through the rest of those suggestions on that page)

My goal is mostly to puzzle and entertain so if you have anything you have used, I'd like to know :)

[1] http://www.msri.org/people/staff/levy/files/MCL/Zvonkin.pdf [2] https://www.mathsthroughstories.org/annos-mysterious-multiplying-jar.html [3] http://bedtimemath.org/bedtime-math-a-fun-excuse-to-stay-up-late/