Arduino Uno

Bluetooth low energy sheild: http://www.makershed.com/products/bluetooth-low-energy-ble-shield-for-arduino-2-0 http://www.instructables.com/id/Androino-Talk-with-an-Arduino-from-your-Android-d/

Adafruit RGB sensors - 10: https://learn.adafruit.com/adafruit-color-sensors/overview

4 hotwheels

That one rug with a city on it

Games:

1. Race - Laps around the board. Uses two color sensors, one in each lane, to track lap times, as well as order of finishers. Usable for 1, 3, or 5 laps.
2. Scavenger hunt - App will display and announce (randomized) name of the building players must go to. The first car detected by the active color sensor is the winner.- Building list: Home, Gas Station, School, Grocery Store, Hospital, Library, Park, Post office, Police Dept., Bank
3. Story Mode - The player(s) will be given a task prompted by the app. To continue with the story, a player must make it to the active color sensor. Some tasks may be timed. Each task will be associated with a specific building.
4. Free Play - All building color sensors are active, the player(s) are able to do anything they'd like, however, when at a building, app will make the appropriate corresponding sounds or other interactive display.