“A gift box, locked from the inside, that will only open at a special location that can be set by the giver.
When the button is pressed the box displays how far away they currently are. They must travel a few miles and check again to see if they are getting closer or further away from the destination! The receiver of the box only has so many tries to triangulate in on the special location.
When they finally arrive at the correct location the box unlocks to present any gifts inside, a message is displayed and a special tune is played!
Arduino Project Parts
This can be built using pretty much any Atmel microcontroller including ATTiny85’s if you only implement the LiquidCrystal_I2C, PWMServo, and SoftwareSerial that talks to the GPS module, and the GPS module itself. All other parts are optional.”