A small portable night light for sleeping in a unfamiliar place is essential for my LO. We always been travelling via plane, ship etc. since he is a baby now he is almost 4. It is easier than first imagined. But the most useful for us was pack light so I always have 1 hand free (1backpack, 1 suitcase) to hold his hands and also easier managing potty breaks etc. There is plenty of entertainment and even snacks you can get ahold of on the go. Familiar items during travel like a favorite toy we bring too. Then sleeping in unfamiliar places became ones challenging when my LO was 2. We constantly had to leave a light on but sometimes those light available were really bright for me to sleep. So I learned to always bring a portable night light!
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