If you want to give your credit card some exercise, head out to Bugis Street Shopping District in Kampong Glam. Why not take a stroll along the marina and watch the sunset while you're here? It's also full of great shops and restaurants, so you can spend the afternoon having a wander. Splash some more cash at Bugis+ Shopping Center, Bugis Junction Shopping Center, and Bras Basah Complex.
You can learn about the history of Colonial District with a visit to Kwan Im Thong Hood Cho Temple. Amble within picturesque gardens or visit the shops in this vibrant area.