Push and pull are a part of daily life, from pushing a friend on a swing to pulling a wagon. Introduce readers to the science concepts behind push and pull forces alongside their pals from Sesame Street! About the Sesame Street ® World of Science series: Explore the wonderful world of science! Ernie, Big Bird, and the rest of your Sesame Street friends make key science concepts like color, light and shadow, and states of matter accessible and engaging for young learners.