To sign destroy, take both open number 5 hands and hold them on either side of your body, where one palm is facing up and the other palm is facing down. Have both open hands meet at the center such that the palms will face each other, and just as they barely bypass each other, transform both open hands into fists with their thumbs sticking out. Then pull these fists apart again, going back in the directions from which they each came.
It is as if the hands just came together to rip or tear something apart.
Teach your baby or toddler the destroy sign when you are describing what happened, big or small: whether a hurricane destroyed the crops that you are now looking at on TV news, or you came home to see that your dog tore apart the pillows on the living room couch. This is also a related sign to break or broken.
This is a useful flash card taught best in conjunction with its synonyms (break, broken) and antonyms or contrasts (make, create). Show your baby or toddler that in life, particularly in nature, destruction is sometimes inevitable. What is important is that nature and people can most of the time rebuild what was once destroyed.