I am a mum if 2 boys. Thy are now 20 and 17 and we are very close. I have adored being a mum to them and agree with what others are saying about you make them what they are.
I didn't know the answers to everything ( I still don't)
I suddenly found lots of things interesting when I had kids. I used to set up science experiments for them ( buy a science experiment book for kids and make volcanoes!). I wasn't in to science at school! We used to go to hills on clear dark nights with telescopes. I have found out a lot about the night sky
I used to ( and still do) have weeks away with them exploring new places. I am passionate about travel and would take them abroad to places off the beaten track ( mainly in Europe). My boys both travel a lot now, sometimes with me and their dad, sometimes with mates, sometimes with their girlfriends. I love music, both new and classic bands and they have been exposed to that all their lives. We are all addicted to gigs and go several times a month ( not always as group we have different tastes!)
We always have and still do have a busy house with their friends. I had a lot of sleep overs and, sure, it was hard work but worth it in the long run . These kids are now men and friends with me on FB and chat regularly.
One thing that me and their dad did from an early age with them , maybe from the age of 6, was to encourage them to think for themselves about politics. Not as heavy as it sounds, just small stuff like 'what do you think about xxxxxx?' and encouraging debate that is age appropriate. I remember one of ours was about schools monitoring lunch boxes and DS put up a good point that I hadn't thought about saying lunch at school was only 5 meals a week and most people had 21 meals a week. He claimed that school didn't know what was had in the other meals. We had a family discussion around that. I think these things around the table or in the living room were healthy to keep the family communicating, respecting difference of opinion and allowing children to expand their thinking and you also get to know what makes them tick.
I'm not sporty but we would have days out in the Lake District. ( we live nearby). It makes me happy to see DS1 and his girlfriend and her child pack up a rucksack and have a day on the fells or go up the Howgills. DS2 has started to introduce fell walking to his townie girlfriend and she is really enjoying it.
When the boys were small they were into mine craft, Farm (vile?) and all the latest trends from school. I didn't get but rollled with it. It made them happy.
I would give exactly the same advice if it was girls.
I loved being a mum to small children ( I have to admit though the teenage years were / are great! I love them as well)