Secrets: Two kittens frolic in a large cardboard box, better than any expensive cat toy! Maybe it’s the faint scent of tuna lingering on the old box that has attracted the frisky felines. Inscribed on the box lid is the phrase "River Severn Tuna." The River Severn is a former favorite fishing spot of Peter’s, and about the unlikeliest place on earth you’d ever find a tuna. A dead bird with its feet in the air reminds us that although cats are loveable and cuddly creatures, they have predatory instincts as well. The kittens on Version 1 and Version Infinity are different colors. In addition, Version 1 features an extra mouse peeping out of a hole chewed in the side of the box.