Anonymous wrote:We started with a light up alarm clock and all four kids understood it at 9-12 months. We switched one to an ok to wake clock at 18 months for nap and they got it. You may have to deal with crying a couple of days. You just try to time it at the usual wake up time and then once they get it you can slowly move it back. Make a big deal that the light is green (or however it looks when ok to wake) when you go in to get them.
Oh, that's a great idea! Set it to turn green at his (now) usual wakeup at 6:30 so he'll see how it works.