怎么用用完的修正带来做溜溜球

塑料瓶盖，两个一厘米长的螺丝一条，把螺丝从瓶盖中间拧入，另外一个瓶盖也拧到螺丝上，拧到两个瓶盖挨到一起。 在两个瓶盖内部打上热熔胶，把瓶盖填平为止。 取出准备好的炫酷贴纸，在填平的面上打上胶，把贴纸粘上去，找一根结实的线， 线的一头打个带环的结，然后把线缠入两个瓶盖中间，线的另一 头从打结的环中穿过拉紧，然后把线缠入 剩余十几厘米的时候，再打一个带环的结，然后就可以愉快的玩耍了。

the yo yo， it may look like a kid's toy， but this twenty first century version is used for competition sport how does this device pull off gravity to find tricks and effortlessly return to your hand deceivingly simple on the outside this miniature machine is packed full of surprises silicon o rings grip the string to accelerate the spool precision balanced aluminium rims produce extra spinning momentum that rotates the yo yo as fast as the blades of a jet engine an intricate ring of bulberry cut friction and make impossible tricks possible the secret to keeping a yo yo stable in flight lies in how engineers build and balance its intricate parts workers of this florida factory must distribute the yo yo's weight evenly on both sides first step cast two identically shaped halves okay so today we're gonna be setting up a yo yo master croftsman arnold has spent seven years building yo yos， he forms the two hearts of the the yo yo inside precision engineered brass molds this is your mold and your mold is gonna be filled with multiplastic that is gonna form the yoyo， the specific design that we're looking for is going to be created in this little cavities here he needs a precise setup to squeeze molten plastic into these tiny spaces and this is a complete setup look like and now it's ready for the processing which would be in the injection modeling machine arnold's mold must withstand eighty tons of pressure to prevent any injected plastic leaking out it weighs over two hundred kilograms okay well， next step would be our raw material and it's like little colored forms there's gonna be melted and shut into the cavities to create your yo yo the machine melts the pellets at two hundred and sixty degrees he then pumped the molten plastic into each cavity too much or too little in each mold and the yo yo want balance if you look at these this is what you're looking for perfect finish a balanced design allows a yoyo to throw and return smoothly but to perform the ultimate tricks the yoyo must keep spinning at the end of the string without slowing down to do this the yo yo contains an ingenious device smaller than a penny ten steel balls roll between the inner and outer rings they work together to cut friction between the layers as the string grips the outer cylinder the inner ring can keep spinning at full speed as fast as the engine of a formula one car this brilliant bearing can keep the yo yo spinning at the bottom of the string for over ten minutes to generate even more spin workers add extra weight to each half the heavier the yo yo the longer it takes to slow down these are for the outside of the yo yo to give it more weight for the stronger spin and better play peter uses aircraft grade aluminium to sculpt special metal rims they must be accurate to one tenth of a gram so the finished yo yo spins true they don't fit just snug enough then the yoyo could be out of balance and the little weight on one end could throw it out work is assembled a yo yo and add an axle to hold the two halves straight a quick spin make sure the two halves balance perfectly these super fast yo yos can't guarantee success， but they do give players a fighting chance。

纸箱别扔，让它变成悠悠球吧！家里废弃的纸箱不要扔！我们在废弃的纸板箱上画出两个半径为三厘米的圆，其中一个圆的中间钻个小洞，另一个圆上面涂上胶水。 把两个圆和二为一，并一张颜色差不多的薄纸每画一下。边缘我们利用铅笔笔先来作为悠悠球的轴承，将做好的两个圆固定在绕好绳子的轴承上。纸箱做的悠悠球完成了。 悠悠球的基本原理是将重力势能转化为动能，从而使球可以一上一下并且转动。下期带你看天上的雨是从哪里来的？

悠悠球教学之简单飘线套圈。

每天分享不同的科技小制作，给孩子一个义教娱乐的不同学习体验，锻炼孩子的动手能力，激发孩子的好奇心和创造力。百说不如一做，欢迎点赞关注分享科技小制作更新内容。每天不一样，欢迎点评探讨制作技巧和想法。 dip dip！ dip！ dip！ dip dip！

十元悠悠球 vs 一千元悠悠球十元悠悠球适合新人玩一些基础入门招式， 一千元悠悠球 适合用来比赛竞技，超强空转和稳定性。