Are anyone else's kids worse when u do nice things for them?

Miranda

I have 3 daughters and they are all pretty well behaved for the most part just normal kid fights hear and there what have you... BUT everytime we do something nice for them, like a little vacation, or trip to a big new park or to fair ect. The hole time they fight they don't listen they argue they and act soooo bad. I can't figure out why? Anyone else have this issue? Of ideas? Lol