Roaled Dahl used a lot of imagination and fantasy in his style explain

Some of Wonka's creations are personified to a high degree, notably the square candies that look round. Rather than just being described with humanlike qualities, these candies are actually given humanlike qualities, when the Oompa-Loompas paint faces on them and they are able to turn to look at people who come in the door. The squirrels are described in much the same way, working to shell walnuts as if they were humans, and reacting to Veruca's intrusion as if they had a humanlike awareness of what is going on.