Marcus is very keen to learn about cricket. We had a bit of a game with a tennis racket in the back yard. I don't think I've pushed him into being interested - although the cricket is always on the radio at our place, its rarely on the TV. He seems very good at perceiving the things we are interested in and being interested too.
This is something I was told before I had kids. Just stick to doing what you love, the kids will automatically love it too because they relate it to you. However it happens, I will enjoy it while it lasts. It will be great when Michael is a bit bigger and the boys can play cricket, soccer, or whatever together without too much refereeing from me.