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.
It will be a consequence when people have assets that their family doesn't know about and when they die, these assets will disappear with them. Children are a hope for parents and usually they will tell their children about the assets they have at an age when they are able to be responsible. The goal is that the assets they own will become an inheritance and every parent will definitely prepare this for their children.
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?
It is not appropriate to tell our children about the investments we are making because they are not yet mature enough to know. But we can slowly introduce the investments we make and their objectives so that they can learn to do what we do. After they understand what investment is, we will tell them about the assets we have so that they can invest in them if one day we die.