Stokke YOYO3

The rebadged heir to the Babyzen YOYO, with one monomaniacal purpose: fold to overhead-bin size so it flies in the cabin with you, not in the hold. At 6.2 kg, usable to 22 kg, it is close to the platonic ideal of a luxury travel stroller — premium-priced, with an early-batch recall worth checking.
OXO Tot 2-in-1 Go Travel Potty

A sub-600g folding travel potty and toilet-seat reducer that solves toddler bathroom emergencies in airports, hire cars and hotels.
Doona Liki Trike S5

The fold-flat toddler trike that fits in the overhead bin: five developmental modes, 6.7 kg, and two years of travel utility in one compact carry.
Nanit Pro Smart Baby Monitor

Nanit’s Pro is the best overhead cot view we have tested: 1080p with superb night vision, sensor-free breathing-motion reassurance (a wellness feature, not a medical or apnea monitor), and check-in-from-anywhere two-way audio. The catch for travel is real — it is mains-powered, wholly Wi-Fi dependent, and the headline Insights sit behind a subscription. Sublime in a villa or long-stay rental with strong Wi-Fi; unreliable in a typical hotel with a captive portal, and not a grab-and-go travel monitor.