The products that get reordered most often, with the reasons parents give for coming back.
The rainbow night light replaced a lamp we had been fighting with for a year. The dimmer goes low enough to read by without waking the baby, and the timer means we stopped worrying about leaving it on.
I ordered the bamboo feeding set expecting it to chip within a month. Six months and a hundred dishwasher cycles later it looks the same. The suction ring genuinely holds against a determined toddler.
The wooden block set is the only toy all three of my children use. It was easy to order, arrived in two days, and the support team answered a material question in writing the same afternoon.