We have two kids too. 8 and 4. Both very quiet but mischievous. We spend time with them as much as we can. That's something they will look back too someday. And yes, train them as early as now to be the best they can be. Talk to them and instill in them manners and respect while they are still young. They'll bring it with them until they're grey and old.
RE: UlOG #11 - Do you have time for your kids? "Train up a child in the way he should go: and when he is old, he will not depart from it"