Простейший электромагнитный поезд 【Как сделать】

How about making this with children to enjoy science?
(Run outside the coil) -    • World's Simplest Electric Train 【Ver.2】  
(Speed Battle) -    • Domino vs Simplest Electromagnetic Train  

(Ver.1 - 9 million PV) -    • World's Simplest Electric Train  

This is a kind of electromagnetic train.
Please enjoy the World's Simplest Electric Train.

【My YouTube Channel】 In this video's URL
   / @amazingsc  

【Subscribe】
http://goo.gl/cckoxX

【Structure and How to make】

It's possible to get such power using a 1.5V alkaline battery, neodymium magnets (super strong magnets with plated with metal) and a bare copper wire.
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

Thank you for reading.

How about making this electromagnetic train for science fair projects?