Answer:
When young, I am sweet in the sun. When middle-aged, I make you gay. When old, I am valued more than ever. What am I?
I can only be played on a windy day. What am I?
I twist and turn and leave a loop. What am I?
I ask no questions but receive a lot of answers
There was a green house. Inside the green house there was a white house. Inside the white house there was a red house. Inside the red house there were lots of babies. What is it?
No matter how little or how much you use me, you change me every month.