supplies

MIG:
Filled ArgonTanks for each welder and spools of welding wire with some extra spools. I need the type of welding wire that would be good for 18 Gauge steel.  0.030 inching wire is the proper size for 18 gauge steel
propane tank for forging demos. 
Replacement MIG Tips.
A can of spatter spray or tip dip gel, there may be some around already

Sheets of 14 Gauge steel. The amount we had last year was perfect
and 18 gauge steel.  Hot rolled sheets
3/8 inch sqaure stock
¼ inch sqaure stock 3/8  inch round stock
¼ inch round stock

cutting torch ( should still be there)
full oxygen and acetylene tanks.

Plasma Cutter tip replacements

Fans next to each welder and some extra fans to keep the kids cool as they will be in there usual welding outfits.
Borax (used as flux for braising)

A lot of cutting wheels i'm guessing about 20
Grinding wheels
8 Flap disks
2 wire wheels that are compatible with the grinders.

2 blade replacements for the Chop saw.
Two ⅛ inch drill bit for riveting finishing materials:
a few rags for cleaning metal for painting and finishing
denatured alcohol for finishing, clear coat spray finishing, and a few basic colors of spray paint of possible. Red, yellow, Blue, black and white and some more fun one if possible

a spray bottle

this may need to be amazoned out for, Gun blue patina for steel