Mile pebbles. Like milestones, but infinitely better.
Interactive art for the memorable moments in your life. Fill your bowl with memories!

The idea is to reach down on special days or events, pick up a pebble and mark it with time and event, i.e.: "Special day in the park when I discovered John having an affair with Lisa and won millions in my law suit", then place it in your bowl and...ECCO: you have a new milepebble.
Can also be used for nice memories like "a walk in Central Park in autumn". Simple and memorable!