Many Nature Explore items, such as tree cookies, balance beams, tables, seating, and instruments, are created from natural, untreated wood products and require regularly scheduled, routine maintenance in order to enhance safety and extend the life of the item. Some items arrive with an initial coat of sealant while others do not, please see product highlights for specifics. For additional information on what to expect from and how to treat your natural wood products, see Important Facts About Natural Wood Products.