Holiday Candy is a seasonal gadget that is available only during the Holiday Update for 10 
for 10 candies. You can only purchase them during the Holiday Updates. It is the same as Dynamite but in a Christmas/Holiday version.
Besides the unique look, these candies do a huge colorful explosion, comparable to the Elf Grenades and the Easter Grenade.
They basically have the same stats as normal Dynamite, they take 3 seconds to detonate before wounding any enemy within the blast radius.