It actually is very possible to leave your possession to your great grand daughter. The best way to accomplish this task is to place the possession is a trust. You can place them in what is called a living trust, meaning that you can use them until your death, and when you pass, all of the property will go to her.
You are really only limited by your imagination as to how you want the trust to accommodate her. You can have her gradually take possession of items once she reaches 18 or 21 or older.
You will want to have a person named as the trustee to oversee the distribution of the assets to her and to make sure that things like property taxes and the like are taken care of. The trustee either needs to be a person in the family you trust with your life or an attorney that you trust. I would go with the attorney route as the trustee. As a matter of fact, you can have the attorney that drafts the trust act as the trustee.
This is a very common practice and something that your great grand daughter can use to her benefit for a long time.
I suggest that you seek out a wills & estates attorney in your area to draft the living trust document. You can specifically name all of the property that will go into the trust, etc.
Let me know if you have any other questions.
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