I use this with my students to get them off of the computer. Transitions are often really hard with our students. This stop light and visual prompts have made transitions off of the computer and other highly reinforcing activities smooth and easy. I use Velcro on the stop light and the visual prompts to stick them on. When students are given the "OK" to start work on the computer/reinforcer they get the "Go" card. Then a couple of minutes before their transition time, I give them the "warning" card so they know the transition is coming. Last, I give them the "Stop" card so they know computer time is finished and it is time to transition.