Kerbal Space Program is not a kid's game. In fact, it's a pretty complex physics and science-based space exploration simulator that encourages strategic and critical thinking.
But that's what makes it so appealing to kids: They're free to discover it however they want, without it being oversimplified for a younger audience. Get this one for kids who welcome a challenge and like to analyze and really think about things.
Based on reviews from actual kids, this game not only teaches concepts like physics, problem-solving and task management, but it's also actually really fun!