Vendeur : liu xing, Nanjing, JS, Chine
paperback. Etat : 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. N° de réf. du vendeur DU007504
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