This is actually called a Suspicious Looking Device. It has a timer and buzzes when it is touched. Then it will roll away. I believe it looks like the Ghostbusters device, except that was yellow;). If you go to the site there is video of how it works.
(HT: BoingBoing)
A person necessarily lend a hand to make critically posts I would state. This is the very first time I frequented your website page and so far? I amazed with the analysis you made to make this particular publish incredible. Great job!