7. Dexter and Dee Dee
When you have a hand-built scientific laboratory by the age of 10, one thing that’s important to avoid is an annoying big sister that ruins everything. Unfortunately for the little homie Dexter, he’s related to Dee Dee. She always broke up his coolest inventions, and would always get in the way at the absolute worst times. Even when he locked her out — through metal, computer-operated doors, by the way — she still managed to make her way into the lab. What’s a young genius to do?