A boy attaches a puzzle piece to a wall-mounted mosaic at the IMM mall in Jurong.
The mosaic was put up by Raffles Institution students to convey the difficulty in finding suitable matches for bone marrow patients; out of 1,000 puzzle pieces, 999 do not fit with one another - with only the last piece able to do so.
Over the weekend, shoppers were invited to donate $5 for the chance to design a puzzle piece. The proceeds went to the Singapore Bone Marrow Donor Programme, which manages Singapore's only registry of volunteer bone marrow donors.
For bone marrow patients, just one out of every 20,000 people is a suitable donor.
This article was first published on Aug 18, 2014. Get a copy of The Straits Times or go to straitstimes.com for more stories.