Anonymous letter lost heart pill raiders fourth dinosaur bones how to do?

How to obtain dinosaur bones in the fourth part of the Raiders of Anonymous Lost Heart is as follows:

1, you can see that there is a battery box in the lower left corner of the skeleton, and there is a paragraph in it, which indicates that you are prompted to put another battery in it.

2. After putting it in, you can press the dog's paw print on the skeleton. After you press it, you can find that the limbs of the bone will change.