Today I increased the depth of the duckling kiddie pool by another few inches, to the point where they can no longer touch the bottom — so they are actually swimming for the first time.
But first, I refilled their paint tray pool and food:
Really swimming; they took to it like ducks to water, unsurprisingly (female ducks seem more comfortable in water; previous male ducklings were more hesitant to swim at all, or made a big production of it):
Still enjoying the paint tray pool too:
Swimming for treats: