Tetherball

The  is a premium decoration that adds 0.50% bonus money and XP to all tasks. It costs 20 donuts, and can be interacted with by tapping it.

During the Black Friday 2015 Promotion the player got a refund (rebate) of 3 donuts when purchased.

Trivia

 * This is the tetherball used at Springfield Elementary in the canon show. They have a cinder block instead of a ball due to budget cuts. It is featured in the episode Lisa Gets an "A".