DC, 6, absolutely loves maths and puzzles, and I'm looking for something that brings them together. They're already doing simple multiplication and Number Blocks is one of their favourite programmes, to give an idea of level.
I'm trying to find something online but not being very inspired with my googling or sites, and keep just being shown Sudoku things, or very very simple puzzles, neither of which is right.
Anyone know good websites for this sort of thing, or particular puzzles that might suit?