一、材料：牙膏盒、硬纸板、磁铁２小块。二、工具：剪刀、直尺、铅笔、双面胶带、牙签（qiān）、彩笔。三、制做方法：⒈如图１用硬纸板做一个长方形扁盒，作为翘翘（qiào）板，并在一端（duān）粘上磁铁一块，另外在盒中央侧面钻一小孔插入牙签，作为翘翘板轴。⒉用硬纸板 First, the material: toothpaste box, cardboard, magnet 2 small pieces. Second, tools: scissors, ruler, pencil, double-sided tape, toothpicks, crayons. Third, the system made: ⒈ as shown in Figure 1 with a rectangular rectangular box made of cardboard, as Alice (Alice) board, and in one end (duān) stick to a magnet, and the other side of the box in the center of a small hole to insert a toothpick, As a seesaw shaft. ⒉ with cardboard