My 5 year old son is very unappreciative. He says please and thank you, excuse me and etc. Hes pretty respectful but NOT appreciative. For example, we've been planning a zoo trip for a few days. Now the morning of he is telling me that he doesn't want to go to the zoo because it's boring because he wants a toy and we said no toy. Then when I tell him then we just won't go if he thinks it's so boring then he changes what he said, "It's not boring anymore, I changed my mind." It's so frustrating! I want him to be excited for things again. It makes me want to take him to do nothing. Any advice?