1. Take a million of that and move to a nice European city. You can buy a literal mansion in somewhere like Berlin, Warsaw, Prague, Lisbon, Vienna. Comparatively, a million bucks will get you an average normal house in SF or NYC.
2. Take a million and put it toward your children's future education. Consider enrolling them in a better school and/or hiring private tutors.
3. What did you want to do as a child? Be an architect? Design video games? Whatever it is, you can now afford it. I highly suggest really taking the time to introspect and figure out what is meaningful to you in life.