Riddle Reef teaches deduction and logical reasoning. Ollie hides a
secret order of shells; your child makes a guess, reads Ollie's clues, and
reasons their way to the exact code — the same "use what you know to
rule things out" thinking behind early maths and problem solving.
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Play together as detectives: after each clue, ask out loud
"which shell do we KNOW is right? which one should we move?" Talk through
one change at a time. Nobody ever loses — if guesses run low, Ollie gives a friendly
peek and you keep going, so celebrate every clever swap.