Bliink

The average person blinks every four seconds, with each blink lasting 1/10th of a second. But you are no average bliinker.

Each round, all but one bubble will blink. Your mission, should you choose to accept it, is to select which bubble did not blink. Keep a close eye on the game. Blink and you miss it. 

MORE FACTS ABOUT BLINKING
 - You blink more when you are talking.
 - You blink less when you are reading.
 - Babies blink ten times less than adults.
 - Conclusion: Quiet babies who are currently reading should master this game in no time. Adults... trying talking less and reading more.