nanoblock - Piplup [Pokémon], Pokémon Series Building Kit

Is it already assembled? Or in it the th origional package?

What are the built dimensions of this?

So it says here it's a legitimate nanoblock, but based on pictures, it looks like they are sending out the Loz version. Could someone verify?

It says the recommended age is for preteens to teenagers but reviews state they got for younger kids. Would this be ok for a 6 y/o boy??