[jyl]

When a family invites a kid to visit, room and board are assumed to be included. There is no need or expectation to pay or offer to pay for that. Sending him with pocket money for activities etc is right.

However, when we have a kid for a visit, the activities are on us as well, and I think that's the more normal practice. After all, the host family chooses the activities and can thus control the expense. So the kid's pocket money is only needed if he/she wants to buy a souvenir etc.