I don't really know about the childcare situation, I have never had mine in childcare. But I do know that the behaviour you are describing is Nate, through and through. Particularly at the age you Shane is at, and particularly when there was another small baby that 'mum' had to look after. It is not exactly sibling rivalry, but definitely wanting mum's undivided attention for himself. He is pushing boundaries, and trying out behaviours to see if he can get what he wants. Unfortunately, I think this is a stage most kids go through at some point, (hopefully they grow out of it at some point too - still waiting for that myself), and some kids moreso then others. This would be difficult enough as the mother of just one kid, but when you have another to look after as you do, it just makes it that much harder.