I think ages between 8 - 10 is pretty suitable for them. If they're 12 and in Elementary School, then they have done really bad and getting left back from the other classes
. In psychology, girls are more mature than boys at a young age and they develop before them, it kinda explains why the majority of them are shorter than boys around the age of 18. So, age has nothing to do with maturity, but they do have their moments at times where they act immature, which is normal. Heh, think about the CN episodes
, there was a time where the PPGs left the citizens of Townsville to save the day, but were clueless on ALOT of things and the PPGs tried guiding/hinting/clueing them in on the how-to's where they (PPGs) were getting pretty annoyed.
Uh, the other thing to look at in this is the Elementary School in Megaville. This seems more like a Private School due to the dress code - the uniforms. So, its possible they have a K - 12 grade. Not all private schools have grades like that.
One more thing... Where the RowdyRuff Boys are located - Somewhere in Nevada. So, if Nevada is around the area in Megaville, then Megaville, on the map, is in the US of A. Hence, the fact that I. M. Weasel made it to the science fair in Megaville.
Heh, when it comes to 2D and 3D art, they funny thing is trying to determine the Nationality of the character.
but I still aim on that the age of them is between 8 - 10.