This is perfect for my 3 year old who used to get up really early. It's such a simple idea, but it does wonders for those parents who have a hard time keeping their children in their room until a reasonable hour. It's very easy to set up, I had no problems. The instructions are very detailed and easy to follow. My son understands that when the light is red, he stays in his room, and when the light is green, he can come out. I love that there's a button that lets you control how bright the light glows. This product doesn't disappoint! [This review was collected as part of a promotion.]