We are really excited to be running Walking Smiles as part of the Hide and Seek Weekender and LIFT Festival 2010. This time the event will run for just over 48 hours continuously, from Friday 9th July until Sunday 11th July and takes place in the foyer the National Theatre.

You can play Walking Smiles from wherever you are.

Have a look at the instructions on our post card above and attempt to collect as many smiles as you can from strangers.

Each time you collect a smile text or tweet it in – as you do we will map them on our handmade map which is based at the National Theatre, London.

Hope that you can join us to cheer up the city/countryside!