Lullaby for Mila

I'm often singing lullaby's to Mila. One night I just started to hum a little melody in my head. When Mila fell asleep I went to ask my hubby if he had heard that melody before, and where it might be from, or did I just made that up. He said it sounds like I made that. "Can we make a lullaby for her from that?" I asked. "Yes, sure. Or we could make a Broadway musical?" He replied. "Well...let's