Time for bed?

Vivian and Jack have a hard time believing it is bedtime when it is so light out.  But, they do have school for a few more weeks, so we still need to enforce a reasonable bedtime.  I have been waking up at 4:30 and noticing the break of dawn.  And, this is what it looks like still after 10:00 at night out my top floor window.  It doesn't seem like that much more daylight would make a difference, but we are still not used to it.  Wow, I can't imagine living further north, like Alaska.  Good night...