Birth and up. Snuggle up with your little one and their favorite Warmie while reading a cute story from the Warmies Board Book Collection! Stay warm and cozy with this cute and cuddly Warmies Microwavable Calico Cat and matching Warmies Board Book, ""A Calico Cat Nap"". Simply warm the plush cat in the microwave and you will have a warm, huggable friend in no time! Warmies feature a gentle, relaxing lavender scent. Warm time: 60 seconds in a 1000W microwave. Heating instructions are on the sewn-in label and should be followed very carefully. Must only be used under careful adult supervision. Cat measures 13"" long. The sturdy board book features soft, padded covers and rounded edges, making it safe for little hands to grip and hold. Book measures 8.25"" x 8.25"".