Right? I’m baffled I had to scroll down this far for a mention of investing, which was my immediate answer, after reading the greentext. And it’s absolutely the thing everybody should be doing with part of their money
And make sure you educate yourself on what colleges your kid is looking into. It sure would suck having all the 529 money get sucked into a scam school that generates debt for unexchangeable course credits.
Also, if you are technically self-employed, 401k + self-employed IRA provides a lot of room for more tax benefits. If you manage to fill those, then you can always open a brokerage account to put additional savings.
Broad market index funds are a popular choice.
Eventually retire so you have time to play those video games and get sleep.