I'm surprised I've never noticed how a bar code is like a frank mark. Finn Badger has a great little repetition of form going on here, both in terms of colour and line. One of the things about mail art that I love is the way that you start to see things differently when you think mail art.
Every year that banana day rolls around again I lament the fact that I haven't saved banana detritus to use in my mail art. I wonder if Finn went on a banana eating binge or was super organised!
Many thanks and hopefully your banana mail will arrive/be sent soon!