I have one question for you. If this is suppose to be a lullaby then why does the chorus have so much jazz and energy to it? If I am suppose to be going sleep like little kid I most certainly wouldn't be very sleepy after hearing the chorus parts. If you are trying to market it as children's music I could understand the energy to the chorus, but since the rest of the song lacks any energy to it, it is more well suited to be a lullaby.
You did a great job and all, its just that incongruity that has the little child in me wide awake in bed thinking about elephants rather than calming me and putting me to a sleep like a lullaby should.