What Einstein ever said is the sole reason for you to read the stories of Rainbow Arch to your kids; if you're busy, just let him listen to the audio-book.
How to define "smart" (or "intelligence") - I guess the answer is about "charater and destiny"!
Many irresponsible "superficially smart" people do stupid things to harm other people for their own selfish interests - it's just a matter about perception of value, and it's also the key to improve our living standards and civilization.
Also, it happens that the framework of spacetime puzzle for Rainbow Arch is inspired by the theories of Einstein and Hawking from the beginning to the end. Hope that many kids of the next generations will have better vision for our future in the space era.