Knee-Cuck Frog 5 Colors Pacatto Gacha Complete Set of 5 Types. Frog Set of 5. When you get knee-cucked, its mouth opens wide, and it gives you a silly look, please don't look at me! - Colors: Colorful (Yellow, Green, Orange, Purple, Blue) - Design: Frog character - Quantity: 5 - Material: Plastic Thank you for viewing.