I for one would love to hear Einstein explain his work to a six year old.
It's the height of academic gaul to think that anyone "understands" how things work in the universe. Einstein went to his grave grasping at the true significance of his ideas. Just because you can express complex ideas does not mean that you understand all their implications or are above those who don't.
If a person can't step back and explain what they are doing to another person then they need to reassess their work and how it relates to the rest of the world. Both Einstein and Steven Hawkins have been very capable of expressing their ideas in "plain" English. If you can't, you aren't as smart as you think.
ADDED: Note, the "you" I'm refering to is a generic one, and not Abigail-II with whom I have nothing but the highest of respect for.