Indian Family - 3N/4D Itinerary, please help us review the itinerary...

Doing a 3-night / 4-day Singapore trip in mid-Aug. Family of 3 adults. Early AM arrival, late evening departure. Looking for a full but not punishing first-timer plan. Does this itinerary work?

Day 1 (arrival) Drop bags → breakfast → pm Gardens by the Bay (Flower + Cloud; OCBC optional) → sunset Singapore River Cruise (hop off Merlion), stroll, photos → Makansutra Gluttons Bay dinner → Spectra light & water show.

Day 2 AM Singapore Zoo → afternoon rest → Night Safari

Day 3 (Sentosa) Universal Studios Singapore (Express) → Singapore Cable Car (rest + views) → Madame Tussauds → new Singapore Oceanarium → Wings of Time evening show.

Day 4 Sri Mariamman Temple → Buddha Tooth Relic Temple → short Chinatown heritage stroll (skip souvenir market) → Maxwell Food Centre lunch → head to airport early for a proper Jewel visit before flight.

Could you please helps us understand if this works? Am I missing something?

I know 3N is short, but we don't have other options here :/

I also am avoiding tour packages, and taking my family. This will be my first international trip with my family.

Thanks a lot for checking folks!