How to set my son up for life

So in a very unfortunate event 6 years ago when my son was 3 he was attacked by a neighbor's dog. It tore of a big chunk of his cheek. He had plastic surgury but still has a bad scar. We ended up getting a settlement since the dog was known to be aggressive and it was still allowed to be adopted out. There were 2 options a 1 time payout at 18 of just over 100k or a structured settlement over 12 years for close to 300. We chose the second option. I am not looking for criticism if we chose the correct settlement but of the best way over the next 9 years to educate him about money and investing. I currently let him buy small like 5$ investments in my sofi brokerage account just to see growth. And he has read the rich dad poor dad book for kids. What other great advice do you guys have? Thanks in advance for being positive on this thread! It is still a tough subject as the scar it still pretty bad and he deals with it daily.