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"The people who run Eli Whitney call these hands-on projects "experiments." As they put it: "Experiments are a way of learning things. They require self-guided trial and error, active exploration, and testing by all the senses. Experiments begin with important questions, questions that make you think or that inspire you to create." This process of exploring, testing and finding out is vital to children's intellectual and psychological development—but opportunities to engage in it are fewer than they once were. “My friends and I grew up playing around in the garage, fixing our cars,” says Frank Keil, a Yale University psychologist who is in his early 60's. “Today kids are sealed in a silicon bubble. They don’t know how anything works.”
Many others have noticed this phenomenon. Engineering professors report that students now enter college without the kind of hands-on expertise they once unfailingly possessed. At the Massachusetts Institute of Technology, “we scour the country looking for young builders and inventors,” says Kim Vandiver, dean for undergraduate research. “They’re getting harder and harder to find.” MIT now offers classes and extracurricular activities devoted to taking things apart and putting them together, an effort to teach students the skills their fathers and grandfathers learned curbside on weekend afternoons."