Solved...

I think I've noticed Ewan's jigsaw prowess before but today in a lazy rainy afternoon of jigsawing, he amplified his jigsaw skills immensely.

These jigsaws come in a box of four and the pieces are all mixed in one box together. He managed to put two of the puzzles together just pulling bits out from the pile and then when he had this specific one done, he pulled it apart and put it back together three times in the time it took Bethany to ferret about with one.

It's fascinating watching the kids learn, you can just see their brain physically working things out.