I felt that I needed to give a bit more info to go with my earlier post.
At this time, Colby takes 2 naps still. His morning nap usually is 1-1.5 hrs and his afternoon nap is 2-3hrs.
Blake takes a 2-3 hrs nap in the early afternoon.
The reason we have been putting Colby down at 6:30 is because about 6:15 he starts falling on his face and can't walk anymore. He is exhausted from going and going and going.
We've tried playing with Blake's bedtime. We've had it 7pm, 7:15, 7:30, 7:45, 8 (over the last month or so) There is no time that is better than others. He either has a good night and goes right down, or we play the game for over an hour (I'd rather play the game from 7-8 than 8-9)
I know it is a phase for both of them. I know it is a matter of getting one to sleep and then the other will fall asleep. I know it will work out sooner or later. It's just tough while it's happening!