Let's say you manage to build a fully functional time machine. You travel back to the late 1800's/early 1900's, and find a random person who volunteers to travel with you to the future. However, they can only be with you for one day before the time space continuum sarts to fall apart! In the 24 hours you have with them before you need to return them to the past, what would you show them?
I would prefer non-memey answers tbh
EDIT: Showing them stuff won't create any paradoxes. The only mess up with time is the aforementioned continuum collapse, you can show them anything you want without any consequences.