riddle, almost impossable to figure out...?

[Evie Allshouse]

Whats green, hangs on the wall and whistles?

 

[American]

i give up, what ?

 

[Birnie :D]

A herring?

 

[simmer]

mabe a green bird ?

 

[Jen C]

Grasshopper

 

[Sir K]

A new carpenter staring down at girls walking by as he constructs a house.

New = Green
Hangs on the wall = The frames of the house
Whistling = Whistling