What can he use to make mountains on a poster board?

He's going to be making a map of 500BC Italy on a poster board, but he'd like the mountains to 'pop' off the board. We thought of mashed potatoes, but I don't think they would permanently stay on....any suggestions?????:?: I'm afraid the water in plaster might just ruin the poster beneath. We just need something that can create a mountain...and stay put! He's building a board game around the map, so he'd like to be able to move the poster board, without having the mountains fall off the board!:shock:

 

what about that air dry clay stuff that Crayola has (model magic I think?) It's very lightweight, so shouldn't cause the board to buckle, and it is paintable so you can get white to save money, make mountains, and then paint them. You can use hot glue or super glue to attach the clay to the board.

 

We made a volcano from quaker oats mixed with white glue.
Debbie

 

We recently made mountains out of the Crayola Model Magic. It worked really well. You'd have to glue it to the board, but I bet it would work. He just wouldn't be able to taper the peaks too much (thin bits of it break easily, but thicker ones take a beating).

The only issue he might have is that we made ours as part of a whole scene, so DS made a large disk of clay and built landscape onto it. When it dried, the parts of the disk that didn't have mountain on top curled up. I'll see if I can find the pics and post them, as I'm not sure I'm explaining myself well enough.

 

This is what I meant... See how the part with the weight of the mountain on top stayed flat, but the other part curled up?

 

that is on clay right? I would try the disney foam clay, it is pretty dry.

or you could make the mountain on the side and glue it on later? You know what I mean? build the parts then assemble it like a lego city.

 

Love the pic Thank you all. I just need to get the toothpicks...which of COURSE I forgot to get when I got the poster board. We need those for the flags to label everything. He actually had to do the board games in PS and it was one of the only things he really enjoyed. Plus his little brother loves playing the games with him.

 

Yeah, that was the Crayola Model Magic. Everything else held up. It was easy to work with (just the right amount of soft vs. not soft).