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Re:Ask HN: Any math-focused gift recommendations for kids? by japhyr on Tuesday November 26, 2019 @02:41PM (#21641860)
We got him the Turing Tumble [0] last year, and he loved it. He'll take years to work through all the challenges. I found The Boy Who Loved Math [1] years ago, and now he reads that on his own.

[0] - https://www.turingtumble.com

[1] - https://www.amazon.com/Boy-Who-Loved-Math-Improbable/dp/1596...

Re:Ask HN: Any math-focused gift recommendations for kids? by sethammons on Tuesday November 26, 2019 @06:33PM (#21643832)
Turing Tumble is really neat. We have a copy at work. Not a lot of replay value, but there are hours of play in it.