> Think about Japan, where kids are often taught to wait quietly for meals or gifts Author got the country and items correct but not associated correctly. In Japan, kids pass the marshmallow test with flying colors but fail the same test if it's a gift. In America kids generally pass the gift test (hypothesis is that they're used to waiting for presents on Christmas). source - https://www.scientificamerican.com/artic…
But I was also a kid who'd beg nonstop to open my presents early. I knew if I opened something early, that was more time with a cool game or something. If I waited, well, that was less time with the cool game. Plus most of the presents weren't interesting. There was just one thing I wanted in particular and the other stuff could be forgotten.