Balanced... Happy vs. Angry

Why can't both kids just be happy at the same time? As you can see, Aspyn was extremely happy today. She had a lot of fun in the bath this morning and she's been exceptionally good all day. She has enjoyed reading her little board books we found today in Braxton's room.

Braxton on the other hand has been whiny and rude all day. At dinner he refused to eat. He doesn't understand why he can't just have something else, but he's starving because he never eats lunch at school. He throws his food away so he can go outside to play with friends. He is so wasteful. I try to explain to him that there's kids in other countries who don't have food to eat, but still he doesn't get it. So after yelling that he hates me and I'm so mean he ended up going to bed hungry anyways. I did give him a haircut after he showered since it was still early and he had the guts to say that he didn't want to have to shower again to get the itchy hair off because it would be a waste of water. WHAT??? Any suggestions on what I can do to make him grateful and less wasteful?

She really did have fun in the tub today!