Young kids usually adjust faster than adults if you get the timing right. On the first morning, open the curtains and get them outside before nine, since bright light is the strongest signal for resetting a child's internal clock. Keep meals and bedtime anchored to Bali time from day one, even if they're eating breakfast at what feels like midnight back home. Short naps under an hour are fine for the first two or three days, but wake them by early afternoon so they're tired enough for a normal bedtime. Most kids settle into the new rhythm within a few days.
Grandparents tend to need more patience. Their sleep cycles are less flexible with age, and a rough flight plus the heat can leave them tired for the first several days of a long stay. Encourage short rest periods rather than a full afternoon sleep, since that resets nothing and just pushes the adjustment further out. If they're coming for an extended visit, our grandparents' long-stay guide walks through pacing the first week alongside the visa paperwork. Comparing a long-stay visa against a tourist visa extension before they book flights helps too, since a longer visa gives them room to ease in slowly instead of rushing straight into sightseeing.
Keep the whole family hydrated and go easy on caffeine and alcohol in the first few days, since both make jet lag worse. A morning walk to a public park or playground does double duty: kids burn off energy and everyone gets the daylight exposure that resets the body clock. If a child's sleep stays badly disrupted after a week, or a grandparent shows confusion, chest pain, leg swelling, or unusual fatigue that doesn't ease with rest, don't wait it out. See a doctor or visit a clinic promptly, since these signs can also point to dehydration, medication timing issues, or something unrelated to jet lag entirely.
This is general information, not medical advice. For anything specific to your child, please consult a doctor or a travel-health clinic.
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