DD (13) is kicking up a right stink because I've planned a trip to the beach for the family (me, DH, her and DS (6). She says she hates the sand and is saying she will refuse to go on Sunday and will stay at home. I've given her some time to cool off and hope that she will change her mind, realistically I don't want to leave her at home and I want her to come with us and enjoy the day but don't know how to handle it. She is very strong minded (as am I) and we often butt heads. I'm already feeling stressed and panicked about it. Any advice?