I got a sister who always mess up my room whenever she wants to borrow my PSP. She always comes into my room without my permission. I lock the door, she exploit it and when i chains up the door, she hacked it! I think i would just go for this Room Defender gadget. At least i feel happy whenever her butt got blast by the foam disks. It is actually an automated motion sensor sentry deterrent with 16 loaded foam disks. You just need to place it facing the door and it will do its job. You have four choices of arm-style: Target, Ambush, Warning and Assault. It's a new toy from GadgetBox with the price of £23.99.

[via techtickerblog]