Toddlers really like to slide the rings on this rattle backwards and forwards, and gnaw on the smooth knobs with the finishes, and in contrast to some rough wooden toys, the wood is sealed with a mixture of coconut oil and beeswax so there’s no must be worried about splinters. https://wooden-toys-dorebu.blogspot.com/2021/07/wooden-cylinder-rattle-for-dummies.html