These is an upgraded set of eyes for the Boon - https://3dkitbash.com/products/boon-the-tiny-t-rex. These eyes have a flat section on which you can affix these (or any other 12mm flat backed doll eye) https://smile.amazon.com/gp/product/B01MQJRQMI/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1.