Funny for the Day- Nap Time

I have a strict schedule for the girls nap time. Brooklyn takes a nap in the morning and then after lunch I put Hailey down. I wait until Hailey is asleep then I put Brooklyn down, because Brooklyn wakes up to any noise, but once Hailey is asleep she's gone. Well today I put Hailey down but I didn't have time to wait for her to fall asleep because I had some photography stuff I had to do, so I put Brooklyn down a few minutes later. I remembered why I can never do this. They just play. I can hear them laughing and talking. Whenever I open the door I catch Hailey over by Brooklyn's crib with Brooklyn just laughing at everything she does.