I made one of these in 1985 on my parents dining table. I had no idea Martin Gardners books were laying the ground for a maths science career. Those books (pick

I made one of these in 1985 on my parents dining table. I had no idea Martin Gardners books were laying the ground for a maths science career. Those books (picked up at random from the public library) were the Numberphile (etc) videos of the 80s - particularly for kids whose family had no science background.