We've been missing our visits to Chiltern Open Air Museum
because of Archie's bad back.
He is a little better now so the Madwoman decided that a
little gentle leash-walking there would be okay ...
As always there was lots to look at, including a few new things.
Like this brilliant device ...
What a stroke of genius!
We reckon this is just what the world has been
The first beadless abacus for adding noughts together!