Walaikum Assalaam
you can not make cartoons of the prophets its stricly prophibited in islam. you can buy some story books of prophet is islam.. and read it to them like bed time stories or something.
If I were to write a story about Mohammed in cartoon form and I do it to show the non muslims just how revered Mohammed was, how can that possibly be insulting?.
Who decrees this? Who decides which drawings/cartoons are to be regarded as forbidden?
In christianity there are hundreds of cartoons about Noah, Moses, David and so on. All were written in such an animated form to help people and children to better understand these prophets. These prophets are the same as the prophets of Islam. And you (not you personally) feel you have the right to tell the christians that they are forbidden from drawing such cartoons!!!!
Too bad. They've done it. There's not much that can be done in the way of banning such cartoons. These cartoons are probably in billions of peoples homes. And every one have been written in honour and better understanding of these revered prophets.