They probably think it's to much. Okay I'm 18 and I'm still not allowed to wear makeup. My parents just worry that you'll change. You won't me the same. Because if it starts with one thing then you'll want more and more. You should always wait for the right and decent age to finally wear make up. Don't make it a daily routine. But if your really young I suggest you to wait. Because you see all those girls your age wearing anything and your not, but later you'll see the difference. their face will be wasted and yours will be the one that still shines.
Good for them. Girls wear WAY too much of the stuff. Your children look like racoons with all that dark mess on your eyes. Thankfully my niece has finally matured enough to realize how ridiculous it looks.