|First Appearance||Platform Racing 3 (2010)|
|Latest Appearance||Platform Racing 3|
It resembles a straw hat with flowers, happy faces and a feather on it. This lead to it receiving the nickname "Spring Hat" before its name was revealed, which became more popular once a new hat was announced for late April.
When a user is holding the hat, all of their stats (minus EXP Bonus) are increased by 3.
The Happy Hat is available as a potential prize in the Level of the Day. Initially it could be found in all levels, though this was changed to reduce the impact of sim maps. An early version was also accidentally given to several users the previous Halloween, though this was quickly fixed and the hat was removed from each player before its power was discovered.