I was just browsing all my mommy blogs, and came across this one… “>http://www.mommieswithstyle.com/mtblog/2009/03/ive_been_looking_for_this_cloc_1.html .
I have recently been trying to teach Kayla the concept of time, because after we put her in for bed at night she gets up and comes out saying “Good Morning”.   Now as my husband and I try our hardest not to let the smile and giggle show on our face, we sternly TRY to tell her that its night time and have her read the numbers on the clock etc, only to have to repeat the process at least 4 more times before she finely gives up.   This nifty clock with different colors for day and night I think would really cement the fact and maybe keep her attention long enough for sleep to catch up to her.  I found it for purchase on Amazon as well as the direct site: http://www.mytotclock.com/index.php?cPath=1

Enjoy, let me know if it works for you!