Combining the Science Museum, planetarium, and SEA LIFE aquarium into a single educational Bangkok day.
Start at the National Science Museum complex in Pathum Thani — interactive exhibits across Natural History, Science, and IT halls; allow 2–3 hours.
A dome show at a nearby planetarium if timing allows — check show schedules in advance as they run on a fixed timetable.
If staying central instead of travelling to Pathum Thani, SEA LIFE Bangkok Ocean World under Siam Paragon covers similar educational ground with easier logistics.
The Science Museum complex requires a taxi or Grab from central Bangkok (40+ minutes) — better as a dedicated day than combined with central-Bangkok sightseeing.
The hands-on Science Museum exhibits work well across a wide age range; the planetarium's dome shows suit most kids but can run long for the very youngest visitors.
Snacks and water for the journey, since on-site options are more limited than in central Bangkok; comfortable shoes for a full day of walking between exhibit halls.