This is a tougher question than it seems at first. I am still not sure what I would wish for.
My initial though was to wish that my family never had to worry about money ever again. We all know that money does not buy happiness though so I though there are better ways to use my wish.
Some other thoughts were to wish that my daughter is always happy, but then I realized you need some pain and unhappiness in your life to grow as a person so no matter how much it is going to kill me to see her go through hard times, it is something everyone needs to experience.
I thought about wishing to never have to work another day in my life. I like that wish, but still think I could do better.
I think what I have settled on is to wish that my daughter and any future children I might have, have a better life than I have had. I have had a great life so far so if there is better than mine then they will be very happy people and that is what I want the most.