Talk:Frequently Asked Questions/@comment-73.203.153.227-20160303163055/@comment-24668482-20160303164611

They are also used for changing your name; and very often you can accidentally buy combining elements with crystals in the collections tab when adding them to your wishlist (by pressing wrong part of screen accidentally). If you have none of a particular type of tool and try to use it in a picture or puzzle, they will also charge you crystals to buy the tool to use (though there is a warning message). But this can happen easily with Time Machines when you run out of time in  a Picture or Puzzle. The game will give you a chance to use a Time Machine if you run out of time, and if you do not have any in your inventory and try to use it to save the game, you will be charged crystals.