If the Moon Were Only 1 Pixel (2014)
There's a walk somewhere in the east of Netherland that I did with my kids a while ago, where you walk through a scale representation of the solar system. You start with Pluto (it's an old walk), then walk a very long time before you meet Neptune, then again a very long time before you come across Uranus. That's already a major part of the walk right there. Then the planets start coming quicker, and the last 10 meters or so is the inner solar system. And after that is the radio telescope array at Westerbork.It really gives a good feel for the massive difference in distances between the inner and outer solar system. I strongly recommend it to anyone who is in that vicinity.