I can't believe I still have to explain this. I do understand cause and effect, I understand that for a given situation involves a number of causes. I've taken several research methodology classes.
I'll type this out as plain as I can and then leave it at that.
Let's start here with the basic ideas that I hope you agree to:
1) Unnecessary pain and suffering is bad
2) If it is possible to prevent unnecessary pain and suffering without sacrificing something of similar moral worth, we ought, morally, to do it
Now lets look at this situation of Toy Guns (And only Toy guns because this thread is about toy guns)
3) Children dying from guns is bad
4) Some children die from guns due to the fact that they are exposed to toy guns designed to look like real guns (evidence given in the list provided by Blacken)(This is shown both by people shooting children because children have toy guns, or because some children think real guns are toy guns (at least two specific cases of this was given in this thread))
5) If it is possible to prevent any unnecessary pain and suffering due to the fact that toy guns are designed to look like real guns, without sacrificing anything of similar moral worth, we ought, morally, to prevent that unnecessary pain and suffering.
6) It is possible to make toy guns seem less gun like (by painting them bright colors and designing them differently)
7) The cost to do this is not similar in significant moral worth to that of any unnecessary pain or suffering
8 ) Therefore, toy guns should be made less gun like and more toy like to prevent any future unnecessary pain or suffering that may result from a toy gun being similar to a real gun