Keep Out!

Inventor's IQ Points for this activity: 200
Clicking "Go Play" will send you to another site. Please read this important message about the links at our site.
You've just returned from Camp Invention and noticed that someone has been rummaging through your room.  Who could it be and what do they want?  Enough is enough!  It's time to put an end to the snooping.  Use your smarts to create some inventions and capture the mysterious culprit.

Name one type of detection device you could use.