funbutton
nounUK /ˈfʌnˌbʌtən/
US /ˈfʌnˌbʌtən/
A funbutton is a button you press to make something fun happen.
She pressed the funbutton and the toy started to sing.
OTHER MEANINGS
2. A button on a website or app that starts a playful activity.
Click the funbutton to begin the mini-game.
3. A big red button at a party or event that makes a funny sound.
The kids took turns hitting the funbutton at the fair.
4. A nickname for a person who always brings joy to a group.
Everyone calls Grandpa the funbutton of the family.