1978: Think Of A Number: Johnny Ball | #OnThisDay 1978: Johnny Ball made science and maths fun for kids and adults alike. They don't make 'em like this anymore! | By BBC Archive | Facebook
1984: Think of a Number | "Votan, turn the light on." #OnThisDay 1984: Johnny Ball showed kids on Think of a Number why smart speakers might just be the future of computing.
![Think Of A Number - Johnny Ball - S01E03 September 1979 - 70s UK Kids TV Science and Maths - YouTube Think Of A Number - Johnny Ball - S01E03 September 1979 - 70s UK Kids TV Science and Maths - YouTube](https://i.ytimg.com/vi/gvN6OwqFMuU/hqdefault.jpg)