It is most common for the above therapists to work with adults. However, there are therapists who specialize in treating children under the age of eighteen. These are pediatric physical therapists. These therapists treat children with orthopedic injuries as well as those with childhood issues such as developmental delays and various diseases. Like other branches of physical therapy, pediatric therapists must have special skills. In addition, they must be approachable to children as they are responsible for the treatment and management of infants and children of all ages. Along with their jobs of providing therapy, they must often first figure out what the problems are. If possible, they attempt to find as early as possible childhood health problems and diseases which affect the muscles, bones, and joints. For these therapists, their overall treatment goals are improving motor skills, balance and movement, and strength and ability to endure regular exercise. They may also treat problems with learning and memory as well as issues with the senses.