Kids need their private space, and this gadget is designed to make sure they get it. The tripod-mounted personal robo-sentry has a built-in motion detector to spot anyone trying to sneak into a bedroom, den, treehouse or anywhere else out of bounds to brother, sister, mum or dad.

Once triggered, it issues a verbal warning then fires a warning shot (a foam disc).

In Warning Shot mode it fires 1/4 of its discs at the intruder. But in Ambush mode it will fire off half the contents of the magazine, and in Assault mode it will empty its entire store of ammunition at the unwanted guest.

The Room Defender comes with a remote control so you can control it from anywhere in the room.

More her.