In this Father’s Day episode of Magic Internet Math, I welcomed my daughter Kayla to the mic for her first appearance on the show. We started with her recent work explaining group theory in just three minutes, then used that as a jumping-off point to talk about why ideas like groups, inverses, isomorphisms, elliptic curves, and point addition matter so much in Bitcoin and cryptography. We also got honest about the difference between intuition and rigor: I’ve spent a lot of time building conceptual bridges for this audience, while Kayla is bringing the mathematician’s instinct to stop, verify the ground beneath her feet, and ask what has actually been proved.From there, we traced the path that led her into math in the first place, from early logic puzzles and Waldorf-school mental math to an unusually rich high-school calculus experience, AP Calc BC, Penn State, linear algebra, analysis, and her current summer research in number theory. Along the way, we talked about why good teachers matter, why “math person” does not mean “numbers person,” how linear algebra suddenly makes everything click, and why Gauss keeps showing up everywhere once you start taking mathematics seriously.Magic Internet Math: https://magicinternetmath.com/BTC Prague: https://btcprague.com/Programming Bitcoin by Jimmy Song: https://jimmysong.org/books/programming-bitcoin/Understanding Cryptography by Christof Paar and Jan Pelzl: https://link.springer.com/book/10.1007/978-3-642-04101-3Benedict Gross (Harvard profile): https://people.math.harvard.edu/~gross/Harvard Math E-222 Abstract Algebra archive: https://legacy-www.math.harvard.edu/archive/122_fall_03/index.htmlLinear Algebra Done Right by Sheldon Axler: https://linear.axler.net/index.htmlPenn State Department of Mathematics: https://science.psu.edu/mathWaldorf Education (AWSNA): https://www.waldorfeducation.org/