I have a crafted a set of twenty two blocks from cherry, walnut, maple and oak. The set includes six large rectangles, five squares, one arch, one half circle, four pillars, two half pillars and three planks. Finished with fine sanding. Why? So there are no paint chips or stains that might end up in a child's mouth. And because finely sanded hardwood is beautiful and smooth as glass. No nails or screws are used. All natural made in the USA.