I know not everyone's story is the same. Some siblings may have better coping skills to deal with the ups and downs. Some people are naturally good at looking at the bright side, while others need some help finding the light... and that's OK too.
A couple of times, Sadie -- the middle child -- came over and started dancing with Max, waving her arms and grinning. He just stood there, amused (I think he could really get used to having girls dance around him).