How i can Explode Minecraft?

Nuke it from orbit.

Use TNT then pour lava over it

Install world edit.

//sphere 46 64

Light it on fire.

Download Minecraft and burn it to a disc or buy a copy from your nearest game retailer, take the disc to a field somewhere, lay it on the ground away from anything flammable, cover it in some sort of explosive (large amounts of petrol are adequate and quite accessible, but dynamite or even a thermo-nuclear missile will do the trick if you can get your hands on them), detonate your explosive.

Congratulations, you have now managed to explode Minecraft.

You mean ignite the TNT? Click on it with a flint and steel.