Reference article
Stump
Stump is an appearance option in the Volcano shop.
Obtaining it
Buy it from the 
Volcano shop with 
Coins.
Use
Assign it to a duck to change its appearance. Appearance items do not improve racing skills.
Duck preview
Reference article
Stump is an appearance option in the Volcano shop.
Buy it from the Volcano shop with Coins.
Assign it to a duck to change its appearance. Appearance items do not improve racing skills.