I love it! Very impressive pinwheels too! I'd use black binding, definitely.
I like Mamagus' idea about the head silliouttes, HOWEVER, you'd have to put them on very precisely or it could be in danger of being overwhelmed by black objects.
They will love it just as it is and it's very creative. Your mom is going to love it and will love seeing your unique creativity. She'll be very proud.