Day 1 — Zoo & River Wonders
The Mandai wildlife precinct is built for a full, unhurried day — Singapore Zoo in the morning, a break for lunch, then River Wonders in the afternoon. Both are stroller-friendly with plenty of shaded rest points.
Day 2 — Gardens & splash pads
Gardens by the Bay's outdoor gardens have space to run, and several public parks around the city have free splash pads — a good way to break up the heat of the day without a full attraction stop.
Day 3 — Sentosa
Beaches, the aquarium, and gentler rides make Sentosa an easy full day with children — pace it around nap times rather than trying to see everything.
A few practical tips
Almost everywhere is heavily air-conditioned, so bring a light layer. Baby-changing facilities are standard in malls and attractions. Taxis and Grab are the easiest way to move around with a stroller in tow, more so than the MRT at peak hours.