Oh dear Olivetree, looks like you got a monster out of the Gate! Don't give up; they are not all like this. I know some days you are going to feel like you need 8 eyes and 10 arms! And with just beginning (I know, I just opened my daycare in August) you don't want to fail that child. I too have a 12 month old child who started in January with similar behaviours. They are old enough to understand a firm 'no' and with consistency it has gotten better (she is still one of my greatest challenges)...but I still confine her to the highchair (with activities) when I know that I'll be busy. Circle time/group activities are all still done when she is sleeping...I have not yet found a way to stop her from being very disruptive when we are focused on an activity (climbing on all of us and the book or activity (I have redirected a hundred times to no avail) , scratching her sister to get her to get up and play with her, crying at top volume when I scold her for this so that we can't continue). Keep in mind too that your children in adapting to your home daycare may be extra sensitive too (I was amazed at some of the behaviours my 2 year old son suddenly displayed). I notice an amazing change in dynamic (for the better) when she and her sister are not here. But to let them go? I just can't somehow. I wish you luck