It's an age thing... I knwo it sounds bad, but unfortunately it's the truth. The old saying Children should be seen and not heard is still very much alive. Being female doesn't help either. I get that all the time, still.

Maybe you should try a different approach... make it seem like it was THEIR idea. It just takes a bit of tricky reverse psychology. Granted, it may not make anyone listen any more to you, but at least you'll know that secretly you're controlling the world!!!! MUAHAHAHAHAHAHA... oh.. sorry... that comes later. hehe