it will be easier to calculate with such symbols. What is special here(unlike "0" - "9") is that these symbols are not only tell you the number. they are the number. When I look for example on the symbol "7", I got the info that I have 7. but I don't really see 7. I just see "7". In order to use 7, I need to see it. using "7" I forced also to image it in some way, for example by using the fingers or imagination. "7" only give the info that there is 7. My version of 7 not only give the info that there is 7, but also show 7. the same about all my numbers. and this is the advantage. I invested hard thought on think about simple geometric shapes that easy and fast as possible to write them. The greater the number, the task became much more difficult (think of a simple geometric shape which this advantage). it may take a little more time to write number greater than 5. But I believe that it is really worth it. You might invest quarter second to write the number. But the number you wrote down may help you calculate more easily. I think it's worth the little energy.

well its as fun haha , well its a possibility ( even if remote since we for the time begin will not create a nem language,and we who are adults already will be dificulty to learn a new count system,it can begin to be teach to our child if necessary haha)