Firmly say "Time" and this bird will count the hours by bobbing forward and the minutes (in multiples of five) by bobbing backward. He does a little "wobble" between hours and minutes so that you will know, "the times, they are a changing."
An Arduino "listens" for sounds and operates a servo motor to display the time.
Major materials needed:
Arduino Radio Shack
small servo motor amazon.com
drinking bird amazon.com
acrylic butter dish homeandwine.com
2 microfarad capacitor jameco.com
9 volt dc power supply jameco.com