I need to make a headboard for my son's bed from a non-toxic material. What would you recommend, apart from sheet of lumber?
I've been considering styrofoam and thick cardboard but I'm wondering if they emit any toxic gasses. Kirin board also seems interesting but I'm wondering if any glues or similar adhesives are used in the manufacturing process. I'm planning to upholster the headboards with natural or organic cotton or other soft material and cover it with a slip cover.
A great way to build a custom headboard for your son would to be to construct your frame from Forest Stewardship Council certified wood, and plywood which has no urea-formaldehyde glues or binders.