The sunny skies turn dark this morning and a surprise rain shower descends. After ten minutes of downpour the precipitation moves on leaving everything washed and glistening. In the garden next door we find a colony of beautiful snails making their way across broad green leaves feasting as they go.
"There are 21 snails on three plants," announces my oldest.
I can not resist and do a little math with her. "Yes! 7 plus 7 plus 7 is 21," she confirms with a smile.