Answer:
David's father has three sons: Snap, Crackle and?
What is yours but only used by others?
Fred and Wilma's child, named after a stone.
You give it to your daddy, you give to your mommy, you give it to your sister and your brother and even give it to Fido and Lassie. If they give it back to you, then you both have one. You also have an unlimited supply. What is it?
What is Beethoven's favorite fruit?
My days are numbered. What am I?