Just to be clear on what a Sibling is: A sibling is one of two or more individuals having one or both parents in common. A female sibling is a sister and a male sibling is a brother. In most societies throughout the world, siblings often grow up together, thereby facilitating the development of strong emotional bonds <Wikipedia> Now that we are clear: The definition is provided to give you an idea of how important it is to interview your Sibling(s). Whether he/she be your whole sibling or your half. He/She may have a wealth of information to share with you, especially if they are much older than you. Do your project a favor and set each one of them up for an interview.
If you have multiple Siblings, interview them separately, then together as a group. Sometimes an older Sibling can help another Sibling to jog their memory on certain events.
We provide an extensive interview list for you to ask your Siblings all the right questions for your GriotBook. This interview checklist can be found in the Family Historian Center and the Authorized Griot Center.
Now, Have fun interviewing your Brothers and Sisters.