If you know that there will be a lot of uncontrolled children at the event, take with you one more assistant, let him/her help you organize the children, especially during the Human inside Bubble act. You roughly assume that there will be many children who will be without any control.
Well, I will soon have an event, a wedding, they want to gather children in a separate room so that I can do a bubble show for them. This also happens. It is obvious that these children will be sent to the hall, where they will be without parents. I'll have to take an extra assistant with me, because I'll have to make sure that nothing is broken and nobody is hurt, which is the most important thing.