From the back of the box:
"It's fun to match pictures of animal babies and their parents, two by two. This little zoo has kitties and kangaroos, pigs and pandas, tigers and turtles! Just flip over cards, two at a time, trying to find a pair that go together. If you find a parent and baby that much, you keep them! Find the most pairs and you're the winner!"
This is the classic memory game but with parent/baby animals instead of traditional identical pictures.