For something completely different and zany comes the "King Cobra" game by Instructables user "talldrinks". In a short period of time they've created this fun game that involves a simulation of a cobra snake with a treat in front of it - you need to grab the treat before the cobra strikes and bites you. In reality an Arduino-controlled servo moves a rod with a tack on the end, and an ultrasonic distance sensor which determines how close your hand is to the treat is used to decide the attack timing of the rod. More of a game for grown-up adults, and demonstrated in the following video:
If you'd like to learn about Arduino - but not sure how to start - then the best way to learn is with our Experimenter's Kit for Arduino:
The package includes a wide variety of parts, sensors and modules including: a servo motor, lights, buttons, switches, sound, sensors, breadboard, wires and more. Furthermore a Freetronics Eleven Arduino-compatible board is included to make this an extensive hobby experimenter, inventor and starter kit. However we don't leave you alone to figure it all out, included is a great project and instruction booklet, plus access to a supporting web page and software examples. In other words - this is everything you need to get started for a fun range of electronics and Arduino related projects!
So to get started or for more information and to order, check out the product page.