用厚纸一个孙准备一根弯曲的塑料管。 滑线人—利用重力二‘,七换千升的抚L具(选自︽婴幼儿智力开发丛书︾之五︽幼儿科技制作与益智游戏︾专辑 中国科普研究所主编、河北少年儿童出版社即将出版︶ 能两 做一个长纸简或找一个堆头简。 变脸人—利用重力使嘴脸变化的玩具把固纸 Prepare a curved plastic tube with thick paper. People who use the slide - using gravity two ’, seven for thousands of liters L (from ︽ Infant Intelligence Development Series ︾ five ︽ children’s science and technology production and puzzle game ︾ album editor of China Science Institute, Hebei Children’s Publishing House Coming Soon) Can make a long sheet of paper or find a stack of sheets. Face-changing people - the use of gravity to change the face of the toy to the solid paper