When can children start bike touring on their own?
The most precocious children start riding on their own bikes at around age 3 or 4. But knowing how to ride in a park or around the house isn't enough. Touring requires other abilities that most very young cyclists haven't yet developed: concentration, following a path, managing effort over the long haul...
Although everyone learns at their own pace and there is no shortage of counter-examples, children can generally take part in family rides on their own at around age 6 or 7. The highly symbolic "age of reason" is synonymous of the maturity they need to understand and apply essential safety instructions.
They are also, for the most part, able to read signs and have the physical ability to ride for several kilometres without loads of untimely stops.