As I was walking round the pound shop I found a shower curtain and remembered the days of teaching when, if we wanted a really big image, we'd project it onto the wall with an overhead projector.
I taped the shower curtain to the wall, made an OHP transparency of a world map outline and projected the map onto the curtain. In hindsight it would have been much easier if I hadn't taped the quite thin curtain onto a wall with a mural on it. It got quite confusing when trying to work out what was a line on the map and what was part of Noah's Ark underneath!
After about 20 minutes, I'd traced the outline onto the sheet with a permanent marker and it was much bigger than the biggest map we'd used for praying with up to now, though I am a little bit concerned that I might have invented a country or two along the way! The laminated map is A3, which shows the proportions.
I tested it out and you can write over the map using whiteboard markers and then rub them off with a damp cloth and the permanent marker stays! The children love using the graffiti board and now they have a massive version for their world prayers! Not only is it reusable, but it also folds down quite small after use. On reflection I'd buy a slightly more expensive, sturdier curtain next time, but for a trial run, it's not bad!!
We're going to use this in the next few weeks to write our prayers for the world and for the coming of God's Kingdom.