Start of an ORK MEK army

I got a bag of plastic toys/crap from flea market yesterday, and am going to start building an Ork Mek army for 40K. Maximum emphasis on vehicles and stompas, big and small. Crude robots and cyborks. Sorted out some bits and tools on the table, ready to go.

We've got:
* Toy cars, buggies, koptas, tractors, excavators etc. that will be the basis for the whole army. Stompas and 'Nauts will most likely be made of empty tins.
* Long pipes, cables, granny grating etc.
* Tools
* Wheels, gears, engine bits, armour plates, random junk
* Weapon(ish) parts, bombs, barrels
* Mantic sci-fi & Pegasus sybercliks parts
* Small screws & barbed wire
* Card, copperwire, spikes, glass beads
* Screw anchors, plastic beads, springs, plastic gears
* Orky bits & couple of older plastic Chaos Warrior, Gretchin and Ork minis
* Bag of bigger tubes and interesting bits
* Box of Legos on the floor
* The old codex just happened to casually lay there on the table.