I made this video for my son Jack to help answer a very common question that kids have. Other whiteboard animation videos I've made can be seen at [ Ссылка ].
Please use for educational purposes under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. For other uses please contact me through the comments.
![](https://s2.save4k.ru/pic/3So7OMwNgy8/maxresdefault.jpg)