Glues are the reason we would not use plywood, even though we used a bunch of it with last years toys. Newly applied finishes, even with the more than 10-year old ban by EPA on lead content in US made finishes, must still be tested under the new legislation as do glues, screws, nails and the like. Sadly, the legislation was passed without consideration of existing limitations of things like paints or finishes (e.g., I doubt hide glue has any lead in it, but it would need to be tested). Again, the word "natural" is the guide term we are using -- if a fabric is dyed, it is not natural; if leather is tanned or dyed, it is not natural. We are not going to use surgical steel nails, either!