HP has teamed up in the UK with the NCH, the children's charity, to attempt to win a Guinness World Record for holding the largest photographic exhibition ever.

Entitled ‘the smile', HP is asking people to donate their smile. In response HP will donate 25p to NCH for every smile displayed on its website.

According to Guinness Word Records, HP need over 35000 smiles to complete the task and so far already got just over 7200 smiles.

You can find more information at http://www.hp.co.uk/smile