All of these experiments were based on that old year 5 science experiment (as shown in the video) where you fold paper in corrugation to support more weight.

I assumed if you glued the paper together and folded it, it would be stronger. This idea does work but you need to be careful how you order the folding and gluing, the first image shows what happens when you fold first and the try to glue it all together. You get weird folds that have no real structure and hold less weight then the un-glued version.

Undeterred by this first set back I glued out a 10-14 thick sheet together and folded it while it was still wet, allowing it to dry in the folded shape. (I was using a 1/3 wood glue water mix in a spay bottle to glue sheets together)

While this makes a good bridge (it held me up between two chairs!) duct taping trucks to it showed the flaw. While the whole length is strong enough to hold my weight, when that weight is concentrated on a few folds they get crushed (image 2)

This was a huge problem but I was determined to make it work so I tried reinforcing a new board with expanding foam (called insulation foam here). With the voids full of foam the board was even stronger and this time adding the trucks did not buckle the internal structure. It however did show the ultimate flaw, paper in this structure will naturally bend if you apply force to the long edge (ie the edge parallel to the fold) hence it would be impossible to turn any board made in this was because it would just bend the board and the trucks would stay straight.

With this final nail in the coffin I changed tact completely, and came up with this...