Help your child take a look at the way things are made and how they work with this fact-packed encyclopedia which shows and explains everything. They'll discover what keeps a plane in the sky, why fireworks go bang, how a digital camera takes a photo, and much more.Help your child take a look at the way things are made and how they work with this fact-packed encyclopedia which shows and explains everything. They'll discover what keeps a plane in the sky, why fireworks go bang, how a digital camera takes a photo, and much more.
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