Ugh, an all day crier is the worst. It is the quickest thing to make me loose my mind lol. The longest I had was 2 weeks. I don't like to terminate but I think any longer than a month would make me consider it.

I have basic rules that every child must follow. However, all children are different and so we have to "teach" them differently and try different approaches sometimes. What worked for mine was, I would sit on the floor and play with him and the group. If he wanted to sit on my lap for a few minutes that was fine but the second he started to cry off he went. If he got really bad(like really loud, out of control crying) then he was placed in his playpen until he calmed down enough to join us again. I encouraged him to be around us all the time even if he was crying. This meant that he did art crying, went outside crying, ate lunch crying, played crying. I just continued on with the day and tried not to give too much attention to the crying. Magically, after two weeks it just stopped and he is now my most easy going child.

Good luck, I hope you can find an approach that works for you and the child and hopefully the all day crying soon stops quickly!