Focused In  Unknowingly, and playfully, these concerns foster greater knowing of the surroundings. For example, concerns on creatures analyze their information and then get them to aware of their actual physical functions. Knowledge gained such way is maintained for some time time, if not forever. Then, there are fun trick concerns and brain teasers for middle-school kids, which are just as crazy and then get them to think difficult and are an excellent brain exercise. Some are: There is a plate containing a colony of bacteria. A individual bacteria in a plate doubles into two - every minute. If this procedure started at 10 am in the early morning, and the plate was exactly 50 percent full at 12:22 pm, what time will the plate be absolutely full? (Ans: At 12:23 pm.) A wealthy businessman said to his kids, 'One of you'll acquire my whole fortune, if you race to the adjacent city, on your camels. The one whose camel's slower & reaches second, will get my fortune."The bros set out for the spot to begin with their camels. On the way they meet a wise man whom they ask the best way to finish this. 

http://www.stressfreebrains.com/focused-in-brain