I got a book about brain training in harvard which is said to help kids develop their analytical and emperical thinking. i asked kevin about one question, it is like this:
x
x
x
x x x x x
there are eight coins above, the vertical row has 4 coins and the horizontal row has 5 coins. you can only move one coin to make both rows to have 5 coins. kevin spent some time but he finally got it after i gave him some hint.
the next one i ask him is a brain teaser, 一只狼在追一个男孩，碰到一条河，男孩不会游泳，也没有船，但是男孩却过去了，为十么？
kevin kept coming with ideas, jump over the river, drink a lot of water to float over, driving a plane, etc, the one a like most is: give the wolf a candie. the answer? 他昏过去了， but i like kevin’s answer better.