实验材料:一个硬纸筒、一张餐巾纸、一根尖铅笔、三根棒棒糖的棍、两根长棍(穿线轴用)、胶、四个线轴。实验步骤:1.用铅笔尖在硬纸筒两侧的平行位置各扎两个孔。孔的位置在中间偏下一点。2.把小棍从孔里穿过去。3.把线轴穿在每边的小棍上。这样,赛车轮子就做好了。4.在硬纸筒上边扎一个孔,插进棒棒糖棍当桅杆。5.用纸巾和两根棒棒糖棍做一面旗帜当帆,把它粘在桅杆上。 Experimental materials: a cardboard tube, a paper napkin, a sharp pencil, three stick lollipops, two long stick (threading axis), glue, four spools. Experimental steps: 1. Use a pencil tip to tie two holes parallel to each other on both sides of the cardboard tube. Hole position in the middle of a little bit. 2. Pass the stick from the hole. 3. Thread the bobbin on the stick on each side. In this way, the racing wheel is done. 4. Bind a hole in the cardboard tube and insert a lollipop stick into the mast. 5. Use a paper towel and two lollipops to make a banner as a sail and stick it to the mast.