expression, noun
baby patting its own face with both hands
A playful, child-directed expression describing the motion of a baby gently tapping its own face or head with both hands. Often used in baby talk or when interacting with infants.
赤ちゃんがおつむてんてんをして、にこにこ笑っている。
The baby is patting its face with both hands and smiling happily.