One question that I get frequently is what to do with your toddler while the others are having school. This is also something that I am dealing with and so far it's not a real problem, AlhamduLILLAH. I usually give my two year old a workbook that I purchased from the dollar store if I don't have an activity planned.
She feels like she is a big girl and I can focus on the older kids. Also, I try to have a few general lessons where I can include everyone and if I am reading aloud, she listens, even if the material is way above her level. I found a website today where there's an abundance of ideas and tutorials. I hope that it is beneficial to you.