Tigger and Einstein are only 5 weeks old from the Annex Cat Rescue. They are fostered by Alexandra Guerson and her family in Toronto, Canada. The two little kittens are keeping their foster family's hands full. Sometimes big purrsonalities come from small packages. These little fuzzballs surely know how to play and have a good time.

Don't you think they are meant to be together forever? (Update: Tigger and Casper have been adopted together!)

Photos courtesy of Alexandra Guerson (More pictures of Tigger and Einstein).