I was thinking 10 or 20 jars of vegemite would be enough. That way thered be plenty available for those who'd like to enter the vegemite eating contest. And a few spare. One jar would be donated to the slab city library so people could try some vegemite on toast or have a vegemite sandwich during the jamboree. Any remaining jars could be auctioned off to anybody who finds they like it (vegemite keeps really well and would suit traveling) with the proceeds going to STP.