Firstly, they display surprising co-operation. Isaac and Joy did not fight over the basket at all, each one taking one handle. Isaac offered her sister the other handle readily.
Secondly, they display surprising co-ordination, with one sibling spotting things of common interest and telling the other one, so that both can carry their basket to the hot spot.
And thirdly, they reveal that a kid's idea of supermarket essentials (ice cream, Kinder Bueno chocolate, and tins of Milo) is very different from an adult's (rice, veggie and eggs).
"Yook! Mi-Yo!" Joy would say, as the two of them scamper over to the tins.
She has yet to master the letter "L" yet.
"This chocolate is nice!" said one of the kids as they filled their basket with it.
We had to remove quite a number of items before we reached the checkout or we would blow our grocery budget and kill everyone in the household with junk food.
"We are here for some eggs and the ketchup 奶奶 (my mom) wants, so please put back all these sweets and stuff," I said firmly.
I allowed one packet of Taiwanese mini-egg biscuits to go through "Customs" but when I got home, I found out they cost $2.20 for that small packet.
$2.20! Goodness! You could finish those mini-balls in 20 seconds!
Good thing they can't push the trolley yet.