Nellie was born in New York City and moved to the midwest when she was a girl. She grew up on a real working farm where she helped to care for the animals and grow crops. Farm life showed her the importance of taking care of the natural world.

Learn how zookeepers at the National Zoo keep the animals healthy and happy. This Spanish book features a hands-on STEAM challenge and uses real-world examples to give insight into how the engineering design process is used to solve problems.