For me it was writing a program to balance my mums household accounts on a ZX Spectrum and figuring out how to load/save data to a tape. Bless her she actually

For me it was writing a program to balance my mums household accounts on a ZX Spectrum and figuring out how to load/save data to a tape. Bless her she actually used it even though it was about as much work as doing it by hand. I think she was just trying to keep an excited 9yo happy. It ended up been rather more sophisticated than the original plan.