Simon is a fan of the 3Blue1Brown channel and absolutely loved their video on solving the Towers of Hanoi puzzle with binary and ternary numbers. He practiced a lot with both. Eventually he developed his own, rhythmic, way to solve the puzzle:
Applying ternary numbers (solving the puzzle in 80 steps):
The video on 3Blue1Brown channel:
Applying binary numbers (solving the puzzle in 15 steps):
Simon watching 3Blue1Brown videos:
He also really liked the video on Visualizing the Riemann zeta function and yelled “Mom, look how beautiful this is!” the whole time:
Still from the 3Blue1Brown video that Simon found mesmerizing:
Geeks out of the box 