Scientists tickle rats to learn about brain activity during play

You can't win if you don't play

Rats get excited, 'giggle' when tickled

Playful behavior in rats is controlled by a specific area of their brains

Scientists Tickle Rats to Try and Figure Out Why We Laugh

Brain Sciences, Free Full-Text

Do Rats Like to be Tickled? – B-School News

Here Is a Man Tickling Rats for Science -- Science of Us

Rats, Too, Giggle When Tickled. Who Knew? : Shots - Health News : NPR

If you give a rat a tickle