Pat a Pet Rat....

Winner Michelle McLane was greeted with hearty handshakes and friendly laughter from her classmates after being announced the first-place winner for her positive reinforcement rat maze.

"We have two pet rats, and I really like them so I decided to do a project with them," she said, explaining how she would give one rat a treat and a pat after finishing a mapped maze and would simply put the other back in its cage.

"I found out they wouldn't try as hard if I didn't give them positive reinforcement," she said. "It does work.

..Positive reinforcement not only works on rats, it works for all...