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30 dní na vrátenie tovaru
Written by an award-winning science teacher, this entertaining and engaging educational reference for teachers, parents and kids of all ages features full-colour, step-by-step directions for constructing a champion mousetrap-powered racer in addition to the plans for 7 additional racers. This book provides a fun weekend activity for the whole family and an engaging source of science and engineering information that doesn't read like a textbook!