I’d say that depends a lot on what kind of skills you have available. As for the providing for your family, the most important part is to focus on being there for them, rather then giving them what you never had. I can assure you that your children will care a thousand times more about a good father then having the newest toy or game. As long as they are fed, clothed, bedded, happy, and healthy, anything will seem like the world to them.
For a less sappy answer, seeing as how you’ve already got a successful business, try taking up a more creative hobby and improving with that in time. You’d be surprised how good you can get at a craft in only a few months. I can’t say for certain it will be able to fill the different you might be looking for, but it will likely bring balance to your work life schedule and be a nice thing to fall back on when things with your business are slow.