We had a small group where the teen daughter of one of the couples baby sat the younger kids. The couples each chipped in to pay her.
I have done numerous Small Group Studies where the children of all the parents were cared for. Typically if it's done by your local Church that would be easiest. However I have done it at a hosts' house who happen to have 2 floors, so the children could play/watch tv upstairs, and the adults could be downstairs. It can be done. It just takes a little work to pull it off.
I haven't found one yet, I bring my kids but its hard to focus cause busy checking on them
Thanks! Your answer is awaiting moderation.