If money was infinitely abundant I would help all the children who are very sick in the hospitals and who do not have the resources to finish their therapies and operations, I would give them an event with lots of magic, theater, and toys, I would do the same for the orphanages and those who are at risk (war, poverty, etc.).
Certainly, money is not everything in life but it is a great help and I know that the families of the little ones would be very happy and that is worth more than gold.