How many hours a day do you spend solely interacting with your kids?

I am a stay at home mom, but also work three jobs from home. I just added the third. I have one 2 year old, I nanny a 1 year old, and have a baby on the way. I would say I spend at least 4 uninterrupted hours playing with my 2 year old. No laundry, no dishes, no work, no shopping. The time has decreased a lot since I began working and as he gets older and more independent.