Once a day, there is a quest to collect the Ghost’s Gifts.
The mission is to find the gifts: treasure bags, balloons, and precious tubes hidden in the Library. Tapping or clicking on the gifts gives you experience points, energy, and coins.
When all the treasures are found, you get a reward for the quest.
Tip: to make it easier to find, you can open the Ghost of the Library quest and press the Accept button. An arrow will indicate the location of one of the gifts.