Okay, "But the white chemical powder keeps baby quiet and happy" sounds wrong even to ME...

The littlest one was colicky and screamed and screamed, never napped,  
and only slept through the night in two- or three-hour bursts. When  
she could finally move around under her own power, the noise blissfully  
stopped. Apparently it was the confinement making her miserable. We  
set her down and let her go.  Enjoying our first bit of quiet in many  
many months, we suddenly realized it was too quiet and ran through the  
house calling her. She came crawling out of the bathroom with a big  
smile and a little white ring around her nose and mouth from where she  
had picked up the Comet for a sniff.