Will visitors be carrying children, bags, brochures or other objects? Will this make it inconvenient to interact with the experience?
Do children provide personal information? If so, have you ensured that an appropriate adult has helped them to provide informed consent? Do children interact with others? If so, this should happen under the supervision of an appropriate adult
Will the individual have something to tell their friends, family or acquaintances? Can you help them do this?
Is data being captured without a clear reason or strategy for processing it? This may contravene new data protection regulations, but also adds unnecessary cost and complexity to data infrastructure
Is the interaction physically tiring? Is it mentally tiring? Is this necessary and, if so, is there room to rest?
Will the individual be embarrassed or otherwise uncomfortable during the interaction? Is this necessary? Can they avoid the uncomfortable situation?
How challenging is the interaction? How fun? How provocative?