This info is from their website.
"Each object is made by gluing dozens of wooden rings to each other. When properly polished, the wood is thoroughly soaked in mordant solution and covered with at least 10 layers of special varnish. This varnish conforms to certain requirements and the Act of Foodstuffs and Commodities (Paragraph 35 and DIN EN 71), which is applicable to children?s toys.
The next drying phase takes several weeks. The final stage involves applying NanoCover to produce a glossy waterproof surface which requires no special care.
Nearly the entire production including a final shape cut requires a craftsman?s skill, so the whole process takes up to 12 weeks."
