I need help with this idea!

[Sandermom]

I'm back with another request for help with my library Sander-Celebration.

I had this CRAZY idea that it would be fun to try to somehow have a Nerf Bridge Run in the park outside the library. I was thinking of creating a lightweight "bridge" of some sort for people to run with across the park while other people shoot nerf arrows/darts at them. 

What could I use that would be big enough to fit at least 10-12 people under, but that wouldn't be too heavy for them to run with if they haven't trained with Bridge 4? I think solid wood would be too heavy, plywood might possibly work, but would still be pretty heavy. I've been trying to find a source for some kind of foam piece big enough and stiff enough to paint like a bridge, but so far, I can only find either memory foam (thick and light enough, but pretty expensive) or thinner foam boards that I could stack, but so far the bigger ones (6x10 feet) I've found only ship if you buy them in bulk quantities. Anybody have thoughts on where I might be able to source something like that? 

Other ideas on what I could make it out of? Ideas about other places I should cross-post this?

[Quantus he/him]

Foam-core hobby board and a lot of hot glue will get you there if you have the budget.  We made some pretty big stage sets out of them in high school and those needed to be light enough for a pair of stage-hands to move.  You just have to sort of box out the structural parts to stiffen them up.  

 

Paper mache might be cheaper though, since you can do it with scrap newspaper and cardboard boxes.  But that might take longer to build

 

[Sandermom]

 

47 minutes ago, Quantus said:

Foam-core hobby board and a lot of hot glue will get you there if you have the budget.  We made some pretty big stage sets out of them in high school and those needed to be light enough for a pair of stage-hands to move.  You just have to sort of box out the structural parts to stiffen them up.  

 

Paper mache might be cheaper though, since you can do it with scrap newspaper and cardboard boxes.  But that might take longer to build

 

Yeah I think regular sized foam core board is what I'll probably end up using and just hot gluing together. I got so excited about the possibility of an actual bridge that could possibly hold some weight, that I didn't realize the practical answer is to just use mostly cardboard type stuff and paint it to make it look cool. It'll be a fun photo op either way. 

[Quantus he/him]

5 hours ago, Sandermom said:

 

Yeah I think regular sized foam core board is what I'll probably end up using and just hot gluing together. I got so excited about the possibility of an actual bridge that could possibly hold some weight, that I didn't realize the practical answer is to just use mostly cardboard type stuff and paint it to make it look cool. It'll be a fun photo op either way. 

Foamcore around a fiberglass ladder, as the main crossing support member?