As a few people have pointed out, don't try to make entrepreneurs. But you seem to be on the right track to be a good parent which is what counts!
As I have pointed out in other posts, I am a serial entrepreneur. My mother and father, also both serial entrepreneurs, did not set out to make me an entrepreneur. They did spend a lot of time with me and my brother. I remember fondly going to the build out of a new store with my mom, or to my dads office, or sweeping (some of the businesses were actually not technical, and required a lot of sweeping, which I did, for a little spending money). My parents went to every one of my brothers baseball games and helped me with every science project and paper and "invention faire". When I grew to the point where I was starting a company and needed advice I would call my parents and the answer would often be something like "Remember the time when we had to balance the books in the store when so and so was stealing? This seems similar." And the light bulb in my brain would go off and off I would go, knowing what I needed to know to handle the situation I was in because of the experiences they had given me. It wasn't forced or "do this so you can be a good business man someday," it was far more of a situation of "hey, would you like to hang out and help around the shop today? I am making a piece for a client and could use a hand."
One other small point. My parents were and are still very wealthy. I grew up in a wealthy area. My friends always had allowances and such. My parents on the other hand never allowed me or my brother to have a dime we didn't work for. Many important lessons were learned from that. I remember as all of my Freshman Spanish class mates left for Spain and I couldn't afford the trip even though I know my parents could have easily popped down the $1000's in cash for it. Can you imagine the business acumen I have now gained from having financial experiences like that? I am grateful every day for them. (And I have made it to Europe on my own many many times at this point, so I am not left out).
The point is, be a parent and make experiences with your kids and nieces and nephews. Don't try to force it. I am now an entrepreneur, my brother is an executive at a large, Fortune 25 company. Build Lego's on Sunday's and be happy to know that in 20 years your kids will say, "I am so glad I got to build lego's on Sunday's with my parents".