The hint button has a number next to it. This button will tell you how many steps are needed to complete the puzzle. If you get stuck you can tap on the hint button and you will be shown the correct placement of a platform, fan, magnet, etc. Hints can be used once every 30 seconds and a countdown timer appears as soon as you use one hint so you know how long you have until you can use another if needed. If you want to purchase unlimited hints without the thirty second lockout you can do so for an additional 99 cents as an in app purchase which will be charged to your iTunes account. It is always a good idea to run the oil through and see if the solution will work before waisting a hint. If you give three of one particular gift to three friends you will be given one of those items to use in your game. The free gifts start out at one and as you progress in the game more free gifts are available for you to send out daily.