This good old story is repetitive but in that structured patterned way that kids love. A prince and a princess need to find a gift for their mother, the queen. Their secret, and brilliant, cat says "hey, why not trade me for something?" They consider a horse, a gold ring, and other delights, but ultimately realize there is no gift as worthy as their clever secret cat--who then gets to join the family for real. Combines kids' love of pets with their love of imaginary friends, while warming the heart. ( )