My two boys were the same ages as the kids in the show. In real life or in between the breaks I was raising two kids off camera who were not unlike the two kids who were being paid to be my kids.
And introduce an element of cynicism and darkness into it and just realize that we're all vulnerable. We are humans. There is a finite end to this life and we're all going to face it and a little silliness can help.
If one tends to be a humorous person and you have a sense of humor the rest of your life then you can certainly lighten the load, I think, by bringing that to your trials and tribulations. It's easy to have a sense of humor when everything is going well.
Fitness needs to be perceived as fun and games or we subconsciously avoid it.