Kura swaps buckets
Here's a brief description of the contestant's attempt. Someone's probably working writing up more detail!
Kura started with a bucket containing 3 ducks, then Justine swapped her bucket with Kura, so she then had 4 ducks. As Kura ended up with 4 ducks in his bucket, he received 4 points.
(Written by Taskmaster Wiki contributors)