After the investigation in the children's hospital, it is found that the electrocardiogram department has the longest examination time and is in a dark light environment. Children are prone to fear, helping children overcome their fear of electrocardiograph, and sucking the cold electrocardiograph into a colorful vegetable shape to relieve the psychological pressure of children during examination and distract their attention. When the doctor sucks the suction ball into the chest cavity, it is like planting plants in the land, guiding the child to feel the joy of planting. (Modeling borrows from planting toys)

Ordinary electrocardiograph sucks balls, only different sizes are used for children.