PetVille issues two new challenges: Tickle Monster and Berry Blueberry

This week's new PetVille challenges just might tickle your fancy (or might just sound kinda creepy, depending). The first challenge -- called Tickle Monster -- gives you seven days (there are six left at the time of this post) to tickle 10 of your neighbors. To tickle neighbors, visit their house and when the Let's Play menu pops up, select the 'Tickle' option. Complete the challenge and score a special badge for bragging rights.