I've heard some interesting stories about pranks that twins sometimes play on their parents and teachers. Ours are apparently starting early.
I went into the doctor's office for a routine non-stress test, where they put the microphone over my belly and listen to each baby's heartbeat. They heard Baby B's heartbeat but couldn't hear Baby A's. They put the microphone all over my belly, listening for the familiar galloping sound of baby beats but --- NOTHING!
While I was getting ready to panic, they brought me into the ultrasound room to try and figure out where Baby A was hiding.
The picture showed Baby B's sleeping, head nestled atop Baby A's chest, using Baby A as a pillow and effectively hiding the (now head-down) Baby A from the doppler microphone. No wonder we couldn't hear the heartbeat! I breathed a big sigh of relief. I can now say that the kids and I have had our first game of Hide n' Seek. Looking forward to many more, with God's blessing.