Answer:
I start new then become old. Start clean but become dirty. I usually start big then become little. What am I?
What can fill a room but takes up no space?
I can be swallowed, but I can also swallow you. What am I?
I am the noblest musical instrument
I always go to bed with my shoes on. What am I?
What is yellow, looks like the moon and has seeds?
What am I?
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic