Collect the indicated number of art pieces for Ginger to unlock the corresponding bonus.

Furry Kilt: 10 art pieces.
Hand Cooler x3: 25 art pieces.
Hand Warmer x3: 55 art pieces.
Health Undies: 20 art pieces.
Legendary Armor: 100 art pieces.
Legendary Dress: 70 art pieces.
Pancho Poncho: 40 art pieces.
Paperweight x3: 85 art pieces.
Toy Sword, Toy Spear and Toy Bow: 5 art pieces.
Viper Sticker, Sterile Undies x2: 15 art pieces.