Last Saturday night, Abi came over for supper (with Mira and Josh of course). It was fun to watch the two kids play together and actually interact, talk to each other. Abi was a great babysitter, but she didn't seem bored, either. They apparently collaborated on some building projects - at least, Abi built stuff, and Henry didn't knock anything down.
Playing with gears.
Josh, a cognitive scientist currently teaching a class on developmental psychology, demonstrated an experiment on Henry. Putting different numbers of blocks into piles and hiding them in yogurt containers, he determined that Henry is a classic "two-knower" - someone who clearly understands the numbers 0, 1, and 2 but for whom any number 3 or over just occasions complete confusion and resets the counter. It was amazing: Henry knew that two was more than one, but consistently didn't know that four was more than one. (A subsequent experiment determined that Henry likes to eat graham crackers. )
Another experiment involved "secretly" moving something from one container to another while I was out of the room. Oddly, Henry couldn't distinguish between what he
knew to be true and what his mom
thought to be true. Which suggests little kids don't know we don't know all their secrets. And when they lie, they think we
know they're lying. Why do they still do it?