One of my 4 year old son's favorite shows is YO GABA GABA.
A feature on the otherwise pretty dumb show is COOL TRICKS where people feature a cool thing they can do.
On a recent episode a kid balanced/ hung a spoon from his nose.
IMO- a COOL TRICK on the droid isn't a task no one else can do but it is a feature of the device you discovered on your own.
My cool trick- i was sitting around browsing yesterday and figured out that while you're in the browser if you repeatedly press on the SEARCH BUTTON it toggles between google search and allowing you to type in a web URL.
What is your cool trick?