It's a bit of a challenge to come up with another that's appropriate for WI & grandchildren, but here goes....
I Don’t mean to brag, but I am pretty amazing at this diet lark. Just finished a 7 day one in under 6 hours.
I'm the same with jigsaw puzzles. I recently completed quite a tough one in less than a day and when I looked on the box it said 3-5 yrs.
Br.