If you have read the previous book entitled. 'The Secret World of Dream Children'. You will know, that children that appear in Plant world. Are dream children, thought or dreamt about, by humans. They arrive in Plant World with skills and talents that they begin using almost immediately.
The same applies with all living things that appear in Plant World. As everything, such as animals, birds, trees and plants, have thoughts, and dreams, just like humans.
When they arrive. They begin to notice everything around them. Some go exploring, such as, Debbie Bee and Esme the Egret. Some become pets of Plant people, who care for all living things, which is why they are vegetarians.