There had been cases when parent invest into project without letting their children know about it and then they suddenly die and it becomes a difficult situation trying to figure those project out and some extended relative might even deny the child access to it.
Is it right to tell your children all the investment you've made even when they're not yet matured enough? If no, At what age should they start knowing about those investment?
When you let your children understand the difference between money working for someone and working for money, they will appreciate you and how do you prove that to them, it's by enrolling them into school investment, not necessary you take them outside, you can give them formal education of wealth right under your roof and as you are teaching them, there should be practical aspect of it going under your management, don't show them what you have invested for them until they become overage.
What you shouldn't do is make sure they don't have access to money too much, your teaching will be worthless if they don't get that guide. By the time they grow up, they will value everything you teach them and continue on that path that you have set for them, every penny that comes their way will go right into investment instead of wasting them on clubs and other things that doesn't matter.