Try the fake crying and let me know how it goes....it almost always works here!!! I use it as a last resort tho lol. I do the playpen thing the most often and when they are calm they can come back out. Sometimes it's because they are tired and they fall asleep in the playpen for 10 minutes and then I wake them up. This little catnap is sometimes all they need. I don't allow more than 10 minutes because I want them to nap at naptime!!

Just a side note...the fake crying came because when we sing "if your happy and you know it" and we get to the "if your sad and you know it, cry boo hoo" they all stop and watch me fake cry...they are fascinated by it LOL