At dinner time Lillian was deeply engrossed in building towers out of Lego. She ignored the delicious salmon, avocado etc. on her plate, and our attempts to get her to distract her.
She figured out a simple engineering principle – that two tall towers connected together (in the manner of, for example, the Petronas towers in Malaysia) are much stronger than each/both of the towers separately.
Teresa remarked that she must have inherited this taste for building with Lego from me, since she (Teresa) had never been interested in this.