This great tool was developed back in 2010 -- I'm not sure how I missed it, or why none of us on GeekDad have written about it before.
The Scale of the Universe is an interactive infographic that allows you to scroll through data from the core of quantum theory and the smallest theoretical aspects of the universe, all the way to the estimated size of the entire universe as a whole.
My children spent a good hour just scrolling through, reading and being amazed by what they could compare. You may have already had a play, but I encourage you all to share it with your children and continue the work of embedding the wonder and sheer size (in both directions) of what we know.
