After being asled in the internet I've made a tutorial about how I made the gargants. The first step is to cut four plates for the sides of the body and a base, be sure to leave some space on the front plate for the "belly" gun. The basic material I've used is tick cardboard altought you can use any material you're familiar with.
Then glue it all together
Then cut an appropriate plate for the shoulders, note that you should leave enough space on the sides to cover the arms and place the shoulder turrets
Next make the head, an empty trapezoid covered with a stripe of cardboard
For the belly gun stick together two drinking straws cutting the enveloping one along its length
Once the gun has been glued use cardboard to make the planking, be sure not to make a regular pattern, orks are a caothic race and you should reflect that
For the face place two fittingly menacing eyebrows and a jaw, all made of tick cardboard
Then place two turrets on the shoulders for them I've used parts from a toy tank
For the feet use two carboard platforms with smaller sections as ankles
Get sure that they'll support the weight of the gargant before gluing! I've found that the ankle tends to break appart so you could consider sturdier materials for that
An ork glyph is always a nice touch
Then on to the arms, for that you'll need toothpicks, plasticard and a plastic sprue. Bread sticks optional depending on the hunger that you may have.
The possibilities for close combat weapons are limitless, here we have a chainsaw made out of plastic sheet and carboard but you can use choopas, wrecking balls and even small screws as drills
Glue the plasticard tube as shown here, the pointy end'll fit inside one end and the other'll be covered by a ring cutted open
Use the sprue to make the main arm with a plastic cilinder on its end as articulation
You can use parts of the sprue to make a lifta dropa too
More complicated weapons can be made such as this pincer following the same principles
The head wouldn't be complete without a putty robotic eye (gaze of Mork) use a pen to make the circle
For the base cut a 60mm diameter circle on a plastic sheet (which doesn't warp in contact with water or paint)
As a finishing touch make two exhausts out of drinking straws and glue them in the back with the help of a cardboard strip
And there you go! It should take you around two-three hours, if you want to make more gargants just repeat the steps and multiply the time.
