Spot 3D crystal smiley face glue sticker self-adhesive label crystal drop plastic sticker can be customized with variouspatterns - AliExpress
Amazon.com: Thought-Spot: Portable Parenting Time Out Mat with 216 Smiley Face Reward Stickers; Aids with Tantrums and Behaviors; Discipline Tool; 24”; Recyclable Non-Toxic Materials; Easy to Clean; Portable : Toys & Games