This one has almost endless possiblilities for both you and the sibling. To set up this one, simply follow a few simple steps.

Initially, having a good relationship with the younger said sibling it handy, as they are more likely to do whatever you ask. Then you just need the scam. Simply put, call over the younger sibling with a look of concern on your face. Ask them if their forehead is sore, because it looks like they have been bitten by some kind of insect. If all goes well, they will actually come right up close to you, and even lift their fringe back for you to look at this 'bite'.

As soon as their hair is raised, grab the head of the younger sibling, and begin drawing with the coloured texter that you have surepticiously hidden in your other hand. As for what you draw it is totally up to you and your imagination. May I suggest using a few different colours - you know, to really let your creative juices flow.

Sure, I know you all think I'm bad for doing this right now, but I assure you, give it a few tries and you will love it. Really.