Plastic Hippo Button - Gray on White – Bolt & Spool
XL GLASS PICT BUTTON "STAINED GLASS" SERIES - CUTEST HAPPY BABY HIPPO 1-1/2 IN | eBay
Amazon.com: MerryMakers Belly Button Book! Soft Plush Hippo Doll, 10.5-Inch, Based on The bestselling Classic Toddler Book by Sandra Boynton : Toys & Games