What happens when you let your kids play Kinect? Well, if you trust Paranormal Activity 4, they turn into the devil incarnate.

Microsoft's motion-sensing device is being used as a scare tool in the upcoming horror flick to help frighten the heebie-jeebies out of viewers, using the camera's infra-red tracking dots to create eerie scenes inside a family household.

Look at them, putting a weird old glow over everything. Aren't they scary?

Skip to the 1 minute mark in the trailer below to see Kinect's starring role in the film.

It's a bizarre product placement, really. Does Microsoft really want Kinect associated with demon kids? Will the kids stop killing everyone long enough to settle down with some Kinect Sports? Does anybody really care?

Paranormal Activity 4 releases in cinemas this Halloween.