Baby - Facial expressions / reactions / reflexes
Girl (in pink) 3½ weeks, and boy 1¼ month old
0:05 Smiling - violins
0:22 Eye Blink Reflex - flute
0:35 Eye widening - hobo
0:51 Anger reaction (0 -- 4th month), chin wrinkle or twitch - piano
1:25 Tongue protrusion - clarinet
1:39 Hiccup - guitar
1:52 Sneezing - bassoon
2:00 Startle - harp
2:21 Yawning - French horns
2:37 Crying - trombone
2:58 Sleeping - Schlafe, mein Prinzchen, schlaf ein
For more baby reflexes check my playlist: