Ok, this evening at 8:50 PM you can see the ISS fly over. IF your grand kids have never seen it or you are interested in seeing it. Should appear WSW sky and disappear NNE will be visible for about 6 mins. as it flies over.
Visit spotthestation.nasa.gov enter the country, state and closest city. I'll Try to post link for the details.
https://spotthestation.nasa.gov/sigh...a#.VvxQV4-cGUl
More information about the ISS
Orbit height: 249 mi
Speed on orbit: 4.76 miles/second
Max speed: 17,150 mph
Launch date: November 20, 1998 (quote Wikipedia)
Orbits earth ever 92 minutes.
Cost: 100 billion EUR