ISBN: 9787530763315 - 全新正版图书 滚动的乐趣 戴尔芬·葛林堡 新蕾出版社 9787530763315 蔚蓝书店 (1 Ergebnisse)

paperback. Zustand: New. Language:Chinese.Paperback. Pub Date: 2016-08 Pages: 16 Publisher: Xinlei Publishing House (Tianjin) Co. Ltd. The book includes a marble and a semi-finished roly-poly toy. allowing children to distinguish between rolling and rotating through experiments. and to create various rolling toys using basic physics concepts such as gravity. friction. speed. and inertia. You can also use clever techniques to move a 99-kilogram object.…