I too have a dedicated playroom downstairs so when I am doing snack/lunch prep everyone comes upstairs where we normally eat and sits at the table or highchair and "chats" while I prepare the meal. Anything the requires oven time I just quickly secure the gate downstairs and turn on the oven and later again quickly slide what we are having in the oven and then bring the crew upstairs. If I have a child who is upset by my absence, then I just put them in their highchair so they can watch me.