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Re:Show HN: Math Games for Kindergarten through 3rd Grade by corysama on Tuesday January 31, 2023 @01:23PM (#34599346)
I'm a fan of the DragonBox series. At least their algebra set. Haven't checked out the others.

https://dragonbox.com/products/algebra-5

https://dragonbox.com/products/algebra-12

Re:Show HN: Math Games for Kindergarten through 3rd Grade by lordnacho on Tuesday January 31, 2023 @02:00PM (#34600023)
The geometry thing is not bad, a bit like a geo proof quiz.