Made from food grade silicone and natural wood, Bpa free, non toxic easy to hold in hand Please note: After being wet wooden pieces may became rough. It is normal because wood is untreated and unvarnished - only hand polished. Rough wood won`t hurt baby but if you want wood smooth again, please use FINE sand paper and slightly polish wood piece. For great result you can rub in wood any vegetable oil or organic coconut or linseed