You spent £20 on a workbook. Your child did 12 questions, got bored, and it's somewhere under the sofa right now. MathBuns was built by a dad whose son struggled with maths. Two evenings of coding. Now both his kids play it unprompted — the 10-year-old who hated practice, and the 6-year-old who just thinks it's fun. It's simple: programmatically generated maths questions in a game format that kids actually want to play. No ads. No personal data. No emails required. Random-name accounts so…