Clothing is the easy part. Pack light, breathable pieces in cotton or linen, plus a few quick-dry outfits since humidity means nothing dries fast on a line. Bring a proper rain jacket or poncho for each kid, not just an umbrella, because downpours here come on fast and heavy. Sun hats, swimwear, and sandals cover most days, but throw in one warmer layer too: aircon indoors and cooler spots like Ubud or the mountains around Bedugul can catch you off guard. Closed shoes are worth having if you plan on hiking or visiting waterfalls.
Health items deserve more thought than clothes. If your child takes a specific medication, bring a supply that will last until you can confirm the same or an equivalent is sold here, since brand names and formulations differ. Pack extra pairs of glasses or contacts, a basic first aid kit, and whatever fever or pain reliever you trust and know the correct dosing for. Insect repellent formulated for kids is worth bringing from home if you're particular about the ingredients, and reef-safe sunscreen is both better for the ocean and easier on sensitive skin.
For gear, a car seat is one item worth the suitcase space. Roads and driving styles here take getting used to, and reliable, properly fitted car seats can be hard to source locally. A compact, sturdy stroller helps too, since many sidewalks are narrow, uneven, or simply missing. Bring copies of birth certificates and vaccination records, since schools and clinics will ask for them. Pack familiar comfort items like a favorite stuffed animal or a few books for the adjustment period, but don't overpack clothes, toys, or baby gear: Bali has shops, markets, and delivery apps that cover most everyday needs once you're settled, and buying locally saves luggage space for what you can't replace easily.
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