Let the creative colleges run projects where they work with a space and create an experience. Then, by the people's vote, make one (or more) concept come alive in the the space it was designed for.
There is a lot of space in the HDB neighbourhoods which is empty, like blank canvases. It is meant to be for everyone's use but is often not used much at all. Could socialising in the void decks and parks be encouraged by making the spaces more interesting?
The proposals would be displayed in the space they are meant for, effectively creating an art exhibition and ensuring that the people affected by the project have a chance to vote for their favourite.
Once the concept has materialised, the space is unique and different from other void decks in Singapore, potentially becoming an attraction for people from other parts of the city.
My friend told me there used to be drawing sessions in her HDB neighbourhood when she was a child. All the kids would bring their papers and pens and sit around in e.g. a park drawing what they saw as the parents chatted and watched. In today's Singapore, parents and children are too busy with tuition in the evenings and on weekends. Maybe this could be a way to revive and bring art back into local life and conversation.