1) Gardens by the Bay outdoor areas (free) · Satay by the Bay for S0 dinner.
2) Marina Bay waterfront loop at night; catch Spectra light show.
3) Chinatown and Little India walking tours; hawker hits like Maxwell/Tekka.
4) Kampong Glam murals + Haji Lane cafés; sample kaya toast breakfasts.
5) Sentosa beaches via boardwalk (S); skip pricey attractions unless bundled.
6) Botanic Gardens (UNESCO) morning walks; picnic friendly.
7) National Gallery free areas; ArtScience public exhibits; Merlion photo stop.
8) MRT day pass for unlimited rides; avoid airport taxis except late nights.
9) Budget shopping at Bugis Street; indie finds at Arab Street.
10) Day trip to Pulau Ubin for cycling and mangroves.