Enhance the value of your visual timer by pairing it with the Time Timer Dry Erase Activity Cards. The Time Timer Original and Time Timer RETRO visual timers have a built-in slot on top. These Dry-Erase Activity Cards fit perfectly atop the timer. They can serve as reminders of timed activities, help ease the transition to what is coming after the timer goes off, set expectations, or assign a timer to a person or purpose.