Answer:
I'm tall when I'm young and I'm short when I'm old. What am I?
David's father has three sons: Snap Crackle and ?
I always murmur but never talk. Always run but never walk. I have a bed but never sleep, have a mouth but never speak. What am I?
I fill a room but take no space. What am I?
I am whole but incomplete. I have no eyes, yet I see. My largest part is one fourth of what I once was. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?