This looks like an 'OK' sign, but not in Brazil Making a circle with your thumb ... cross your fingers in Vietnam In most cultures, crossing your fingers means you're hoping for good luck.

In fact, more than three-quarters of infants suck their thumbs or fingers through the first year of life. A child usually turns to the thumb when bored, tired, or upset. It is not uncommon to see ...

Shaking and quivering arms and hands in a stronger wind. One finger, one thumb, keep moving One finger, one thumb, keep moving One finger, one thumb, keep moving We’ll all be merry and bright.