Local parks, cycling paths and garden games can build fitness and fresh air time without stretching the family budget each month.
Choose routes with hills, streams and picnic spots to keep young walkers interested, and pack waterproofs for changeable British weather.
Use under-bed boxes, wall hooks and labelled shelves to keep clothes, books and toys tidy in a room shared by brothers.
Set simple age-appropriate jobs, agree a weekly amount and help boys split their money between spending, saving and giving.