Giant magnetic coin-like structure invites people to leave behind their spare pennies, when passing by the Southbank Centre in London. The installation will close on 8 October 2010 and £1 will be donated to children’s charity Barnardo’s for every penny attached to the structure. Drop is an inspiring example of how to playfully engage people in making a donation – the interaction is simple, intuitive, and fun, as people move around the collected pennies like they do with fridge magnets, drawing or writing messages. Drop stimulates visitors to purposefully leave a trace, feeling ownership of their space, while giving back to the community.

This is a project spotted on Dezeen – I have not seen it in person, and wonder if people know how significant their donation was… even if the project does not need instructions for interaction, it still would be nice to know what will happen to all these pennies – especially when it is so motivating to know that each penny will become pounds…