He Who Shall Be Unnamed said:
Along with how much to leave your kids, I think about this as well. Right now, I am of the thought that the ideal time is some time after they have finished school and attained employment and the time that your mind starts to go and you need help. Unfortunately, I have seen a few kids up close and in person who have inherited trust funds early in life and I can see signs of the money being "demotivating" to them.
I was just having this conversation a few weeks ago with a friend of mine who is worth hundreds of millions. He has three kids still in school, and is very acutely aware of the dangers of letting them know what awaits them. They live a very nice lifestyle, and his kids have seen a lot of evidence of what the family has (including entire buildings at home and abroad donated to a prominent university by their grandfather), but he has also chosen not to let them know what their Trust funds hold. So far, it seems to be working out for him in terms of the effort his kids are putting forth with regards to their educations.
I remember going home after a bar late night in college with one of my fraternity brothers. Zero effort at A&M. Idiot failed Spanish and he could speak fluent Spanish. Sold his books before finals for party money. Went to Ausitn one weekend with him and other frat brothers but they were in a separate car. On the way back from Austin he kept trying to get me to go to Galveston and skip class. I told him no, I had a Mechanical Engineering class that Monday. When we got back to CS, idiot went to Galveston but not with me.
That night driving with him I asked him why he was like that and didn't he want to succeed in life.
He said, I need to share something with you. I have an inheritance coming..... don't tell anyone but it's going to be as much as FOUR figures. That was when I realized I need to get away from him and I did.
Freaking moron. Died a year or two later in Dallas during college in a bar fight.