Creating props - 'stone blocks' for medieval play

Time again, to ask the experts...can anyone advise how to make /obtain stone blocks strong enough to hold 1 or 2 persons (sitting on them). I've seen several productions using similar, but I was told they were fibreglass?? We found and used a large polystyre block some years ago, that worked well, but am not sure where one would obtain similar. The poly block was approx 900MM L X 400MM H x 450MM W..... Johnny Grim

Johny I'd forget about the Poly blocks, because they will perpetute thier own flame, even if they are covered in flame retardant doped material. Franly when I come across the Poly stuff on stage,I hoy it in the bin. However if you need verification you can check with the local Fire Brigade. I have used in the past milk crates or made up plywood boxes, which are easy enough to do. Or even find some kids toy boxes?

Sorry Johnny i forgot to add my name to the above post! chookas Joe Mccabe

thanks for the tip Joe, didn't think of kid's toy boxes. cheers JG

Hi Johnny, I suggest you contact Steve and Geoff at Hale, as I think they would probably have some already made. Steve could also give you some tips. Chris E

plywood or chipboard boxes covered with paper mache or plaster and finished with limestone finish paint or similar

Thanks for all the ideas guys. I've learned something new. cheers Johnny Grim