Please please can anyone help find this toy which I should have just bought as soon as I found it online...
It is based on sudoku. But 3-D. I have found plenty of 9x9 cubes, that's not it. It is a dodecahedron (I think) with triangular (I think) plates that each have dots on the corners, and you clip them together so that the dots add up to 9 where all the points of each of the flat pieces meet.
It must be on some gift website but I can't remember which. I have looked at A LOT of websites in the past couple of weeks without buying anything and now I am panicking slightly.
If it helps I think it was between £10-15 but might have been less. It will keep him quiet ALL DAY, I tell you.