Behavior Modification

"Dino" Don Lessem brings readers face-to-face with various dinosaur species, detailing their habitats, way of life and how they became extinct. An acclaimed dinosaur expert, Don Lessem has written more than 30 children's books, writes a popular dinosaur column in Highlights magazine, and was an adviser for Jurassic Park. Take a trip through dinosaur time to meet these fast dinosaurs face-to-face: The Gallimimus could outrun a sandstorm! The Struthiomimus may have been the fastest dinosaur. It could run up to 60 miles per hour! The Liaraptor ran until it took off into the air! These may have...

An award-winning, educator-approved first book on birds. In this simple volume, educator and author Cathryn Sill uses clear, easy-to-understand language to teach children what birds are, what they do, and how they live. Noted wildlife illustrator John Sill provides beautifully detailed, realistic paintings to showcase the birds' diverse and natural worlds, and an afterword provides more details about each bird and inspires further learning.

Aquí encontrarás los mejores chistes, que te harán reír durante horas y con los que serás el rey de la fiesta. ¿Sabes qué es exactamente un segundo? ¡Pues el tiempo imprescindible para contar un chiste corto y que todos tus amigos pasen horas llorando de risa! ¿Qué tienen en común un autobús de jubilados, un niño faquir y dos vacas locas? ¡Pues que están todos dentro de este libro! Aprovecha los silencios incómodos para demostrar tus dotes de humorista y convertirte en el rey de la fiesta. Tu único reto será que dejen de troncharse para que tú puedas contar el siguiente...

For Barack Obama, becoming president of the United States brought big changes—for him, his family, and the country. Every day he faces important meetings, tough decisions, and the opportunity to meet new people. But he still finds time to invite friends over for a movie and walk Bo, the White House Dog, with his daughters, Sasha and Malia. How does he do it all? Follow the President through his day and find out what it's like to be Barack Obama. Para Barack Obama, convertirse en presidente de Estados Unidos fue un gran cambio, tanto para él, como para su familia y para el país. Todos los...