Marble Run adapter for Ikea Malm dresser

If you've got one of those Malm dressers from ikea -- http://www.ikea.com/us/en/catalog/categories/series/07468/ -- then you can turn it rather easily into a pretty sweet marble run. Marbles will roll across the top of the drawer, then down this half-ellipse-shaped ramp, and then across the next row of drawers in the other direction.
To make this ramp, cut it out of a thin, flexible material, and assemble the pieces. In my dreams, this ramp should be made out of 1/32" birch aircraft plywood