Throughout the series, they display a talent for inventing and often use Kim's stuff to create their own inventions. They also help her fix and upgrade the beat-up car their Dad gave her, and program it to increase its speed, endurance, and power. Despite their obvious intellect, Kim has trouble seeing them as anything more than annoying goof-offs, believing them incapable of some of the things they have achieved, such as building a hand-held Silicon Phase Disruptor, believed by Drakken and other scientists to be impossible, or skipping grades to enter Middleton High as freshmen at the age of thirteen. However, there have also been times when Kim showed both true affection and appreciation for them and their skills.