You might think children's tongue twisters are just a fun little ... a satisfying way for kids to practice getting their words out clearly. Research published in The Role of Tongue Twisters ...

This is why, for example, children sometimes move their lips while reading in silence. Last, but by no means least, some scientists suggest this instinct to tick our tongue out when concentrating ...

Can you roll up the edges of your tongue so that the tongue forms a sort ... found that where both parents were positive, most children were positive, that where both parents were negative ...