I had a little one like this as well, she lives in a house with all adults who have treated her like a little 'doll' so she THINKS she needs to be picked up constantly and had no idea how to interact/play with or alongside the other children. Patience is key and trust me its not easy to listen to for hours on end. It does in turn effect the other children. It took my little one a few months of this, but I never waivered in picking her up. She would cry in the highchair, cry in the playpen, cry in the daycare rooms, cry if someone walked past her...but we would all remind her that she was ok and then ignore the crying. Each day it was less and less and now she is the sweetest little girl that we all just love to pieces! The other children would also tell her "its ok, mommy be here soon" and continue playing. It also helps if the parents are on board and help out in respect to not giving in to her every whim at home...not always easy as parents usually don't 'get it' but might be worth holding onto. Trust me, many days I swore it would be here last night as I just couldn't handle the crying, but now I can't imagine her not here. It will all depend on how much you can deal with the crying.