"Un bostezo, como una risa, es muy contagioso. Y después del gran bostezo, ¡dormir es delicioso!" --From publisher's description.

"It's night-time in the zoo and all the animals are getting sleepy. First to yawn is the tiger. Then the swans start, then the crocs, the giraffes and so on. Soon the whole zoo is ready for sleep... We all know how contagious yawning can be and that's why this is the perfect book for bedtime - kids won' be able to resist the joyful illustrations of these yawning animals." -- Publisher description.