Plan record — demo only

The proposed day uses one indoor venue and one food break, with 60 minutes of separately counted rest. From 09:00, the plan allows 30 minutes to reach Ropponmatsu; the official rail segment is approximately 12 minutes and the rest is walking, waiting and buffer. Basic exhibition time is split into two blocks, with lunch at 12:00 and a return departure target of 16:20. Estimated return to Hakata is 16:50, ahead of the simulated 18:00 limit.

Family budget range: ¥8,520–¥13,520 against an assumed ¥18,000 ceiling. Transit and admission use published fares; food and contingency are estimates. No planetarium, special exhibit, reservation, or exact train departure is included.

Rain plan: keep the activity inside the museum and use a restaurant in the same connected complex. The museum's indoor dining space is a conditional fallback only; check availability.

Fatigue plan: skip the second exhibit block and head for the station early. Leaving early is a valid plan outcome.

Candidate comparison also found one other eligible option: Fukuoka Asian Art Museum — South Asia Special Edition. Its estimated family budget is ¥9,060–¥14,060. Science Museum was selected only as the simulated demo choice because the scenario's inferred preferences point more strongly to hands-on science; art viewing and the children's picture-book corner remain a valid, calmer alternative.

All times, limit, budget and preferences are simulated demo choices. They are not proposed to a real family for approval. Both route limits start at Hakata Station; home-to-station travel is excluded.