It's still marketed towards kids, but I got this leaf shaped one (https://www.amazon.com/Sensory-Oral-Motor-Chewelry-Necklace/dp/B0738YHCTY/ref=mp_s_a_1_3?crid=1OVSU7CFFWE8A&keywords=leaf+chew+necklace&qid=1554309593&s=gateway&sprefix=leaf+chew+n&sr=8-3) and it's got nice little ridges for texture. It's also not like, super kiddy like some of the animal ones if you want more than a smooth stone style.