The Fun Light is a wooden stick with a curved top that holds a burning candle. The fire and smoke from the candle produce a concentrated bright light that attracts dragons to it. The light can be moved back and forth in an attempt to get dragons to chase it
At some point before the events of School of Dragons, the Fun Light was created by Hiccup in order to help trainers play and bond with their dragons.
During the events of the game, Hiccup gave the light to the player once they had obtained their first partner dragon so that they could play with their dragon and create a closer bond with it.
- The Fun Light may be a reference to the film How to Train Your Dragon, where Hiccup attracts a Terrible Terror back into its cage by using the reflection of his shield to shine a small light at it after observing Toothless chasing a light in The Cove.