The Snowball Launcher is a limited common toy that was added to Adopt Me! during the Winter Event 2020. Since it is now out of the game, players can obtain it through trading or during the Winter Holiday (2020).
Players had to look around the map for presents, which when searched, gave them the Snowball Launcher parts. After searching through 3 presents players were given the Snowball Launcher along with 800.
It currently serves no real purpose, and is purely a collectible/cosmetic. When interacted with, a snowball is launched from the Snowball Launcher and plays an animation when it comes in contact with another object it will "explode" and emit white particle effects.