Kids Riddles

Question: My boots can fit though the green glass doors but my shoes cannot. Sea weed can fit but algae cannot. A tree can fit but a forest cannot. The moon can fit but a feather cannot. Why is this?

Question: Draw, fire, or fill me;
I'm still empty.

What am I?

Question: what did the postman say to the mailbox?

Question: What is the easiest way to poke a balloon without popping it?

Question: I'll bring out your bulls,
and slow your roll.
I may even come out of your skull.

What am I?