How do the Hint and Hotspot options work?

Using the hint option the first time will give you a hint to the solution. Using it the second time for the same thing will show you the exact place where the object is or what it should do. The third use of the hint for the same task will solve that specific task. You have to use coins for each of the hints.
After activating the Hotspot option, you need to click on this icon again so that you can see all the places where the tasks and puzzles are.