Babysitting tips for a teen babysitter?!?

Part of the problem might be the time of day. If this is part of their routine, it may be hard to break them of it. Plus as a babysitter it really isn't up to you, it's up to the parents. Certainly take a couple of games with you that are age appropriate and this might work. Or work with it and bring a video or two that is less violent and more age appropriate.