~ Gabriel said: ~

~ We want to do something "big" on April 7 here in LA ... ~

Hey! that's my birthday!!! :D

I've always used 1/4" plywood, finished one side. It does pack up nicely and travels much lighter. When I was installing the global Peace Tiles mural at the International AIDS Conference this past summer there were tiles there that were created on this very thin but firm white board. I couldn't figure out what it was and I'm not sure where it came from ... they came from everywhere! It's quite possible that one came home with me; we divided up some at the end. I'll check and if there is will take it to the local lumber yard and see if they know what it is. Very lightweight and sturdy.