Got a good secret?

Inside Message at bottom right hand corner reads:

Seven for a secret (never to be told)

Woody is always looking for magpies.  A childhood obsession motivated by the old counting rhyme: one for sorrow, two for joy, three for a girl, four for a boy, five for silver, six for gold, seven for a secret never to be told.

Each A6 card has a matt interior for ease of writing and is individually packed with a brown ribbed envelope.