This is speed challenge of Simplest Electromagnetic Train (compared with domino chain reaction). Best performance is 3:12
(How to make)    • How to make Simplest Electromagnetic ...  
(Run outside the coil)    • World's Simplest Electric Train 【Ver.2】  

(1st model 10 million views)    • World's Simplest Electric Train  

This electromagnetic train is made of neodymium magnets(super strong magnets), copper wire and a dry cell battery.

【My YouTube Channel】   / @amazingsc  

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【Structure and How to make】

It's possible to get such power using a dry battery, neodymium magnets (super strong magnets which plated with metal) and some bare copper wires.
A point is that a magnet's diameter is bigger than a dry cell battery's diameter.
And an electric current flows to a coil through a neodymium magnets, and a coil will be an electromagnet only in an area between the magnet and the magnet.
The electromagnet and a neodymium magnet poles repel each other at one side.
The other side poles pull against each other.
They work same direction, and it become a big force.
The phenomenon also continues at a movement destination.

※Another important point is magnets direction
(e.g.) NS battery SN

How about making this Simplest Electromagnetic Train.

Previous title
Domino vs World's Simplest Electric Train 【世界一簡単な構造の電車】